Nothing spoils a quick afternoon swim faster than running your hand along the pool wall and feeling a slimy film of algae and grime. A robotic pool cleaner with a climbing brush solves that problem by scrubbing walls and waterline right alongside the floor. This guide focuses on the best robotic pool cleaner climbing brush models for 2026, covering both corded workhorses and cordless app-controlled options for in-ground and above-ground pools.
We evaluated dozens of models based on climbing power, brush design, filter capacity, and navigation smarts. For a deeper look at what makes a great scrubbing brush, check our guide to scrubbing brush robotic pool cleaners. Below, you will find the full lineup of the top contenders, followed by a practical buying guide and honest recommendations.
Pros
- Wall climbing feature cleans both floors and walls, reducing manual scrubbing.
- Active scrubbing brush provides deep cleaning without damaging pool surfaces.
- Easy top-load filter basket simplifies maintenance.
- Plug and play operation makes it user friendly, no complicated installation.
- Dolphin brand reputation for reliability and performance.
Cons
- Designed for in-ground pools only, not suitable for above-ground pools.
- No remote control or smartphone app for manual direction, relies on autonomous navigation.
- Initial investment may be higher compared to manual pool cleaning tools.
The Dolphin Nautilus CC Plus is a fully automatic robotic pool cleaner specifically engineered for in-ground pools up to 40 feet in length. It is best suited for pool owners who want a hands free cleaning solution that handles both floors and walls with minimal intervention.
Standout features include its active scrubbing brush which combines wall climbing power with a continuous scrub action. This means it loosens and removes stubborn dirt, algae, and debris from pool surfaces without the need for manual brushing. The top load filter basket is another highlight, allowing quick removal of captured debris for consistently clear water.
In real world performance, the plug and play design truly simplifies pool maintenance. Simply connect the power supply, drop the unit into the water, and let it run for about two hours. Its smart navigation ensures thorough coverage even around obstacles and irregular shapes. The build quality reflects Dolphin's40 plus year legacy in pool care, using durable materials to withstand constant submersion and chemical exposure.
One potential drawback is its limitation to in ground pools only, so owners of above ground pools will need a different model. Also, there is no manual remote control, but the autonomous navigation is generally effective. At just over20 pounds, it is easy to lift but may be heavy for some users. Overall, the NautilusCC Plus offers exceptional value for those seeking a reliable, low maintenance robotic cleaner.Final verdict: For in ground pool owners who value convenience and thorough cleaning, the Dolphin Nautilus CC Plus is a top choice. Its wall climbing scrubbing action, easy filter access, and set and forget operation make it a worthwhile investment that saves time and effort.
Brand: Dolphin
Model: Nautilus CC Plus
Color: Black
Dimensions: 16 x 10 x 16 inches
Weight: 20.8 pounds
Compatibility: In ground pools up to 40 feet in length
Cleaning Cycle: Approximately 2 hours
Pros
- Cordless design eliminates tangled cords and provides freedom of movement
- Smart navigation and multiple cleaning modes adapt to different pool surfaces
- Large debris basket reduces frequency of emptying
- Automatic parking above waterline simplifies retrieval
- App control adds convenience for scheduling and monitoring
Cons
- No user reviews yet, so real-world performance is unverified
- App update process may require uninstalling old version, which could be confusing for some users
- Charging port must be covered before submersion, adding a step to setup
The CZYBYTE Cordless Robotic Pool Vacuum Cleaner is a versatile solution for pool owners seeking automated cleaning without the hassle of cords. Designed for both inground and above-ground pools, it targets floors, walls, and waterlines with three distinct cleaning modes. This makes it a strong choice for weekly maintenance, especially for those who value convenience and smart features.
Standout features include intelligent S-shaped navigation that optimizes route planning for complete coverage, and a long-lasting battery that supports uninterrupted cleaning sessions. The robot automatically parks above the water surface when finished or when the battery runs low, so you don't have to fish it out. The 4L top-loading debris basket with 150 micron mesh captures everything from fine particles to leaves, keeping the pool crystal clear.
Build quality appears solid with a white finish and compact dimensions (15.63 x 15.16 x 8.86 inches). The app support adds a modern touch, allowing you to control and monitor cleaning cycles remotely. However, the app requires a QR code download and existing users must uninstall the old version before installing the new one, which could be a minor inconvenience.
Potential drawbacks include the lack of user reviews to confirm durability and performance over time. Additionally, the charging port must be covered with a plug before submersion, an extra step that could be forgotten. Battery life specifics are not provided, so actual runtime per charge remains unclear.
Overall, the CZYBYTE Cordless Robotic Pool Vacuum Cleaner offers a compelling package of smart navigation, cordless freedom, and a large debris basket at a competitive price point. It is well-suited for pool owners who want automated cleaning with app control and minimal manual intervention. With a rating of 4.7 out of 5 (though no reviews yet), it shows promise as a reliable maintenance tool.
Color: White
Dimensions: 15.63 x 15.16 x 8.86 inches
Debris Basket Capacity: 4 Liters
Mesh Density: 150 microns
Cleaning Modes: Three modes (floor, walls, waterline)
Navigation: Intelligent S-shaped pattern
Power Source: Cordless, rechargeable battery
App Support: Yes, with QR code download
Product Group: Lawn & Patio
Pros
- Cordless operation removes trip hazards and simplifies setup.
- Extended runtime covers large pools in a single charge.
- Wall climbing provides thorough above-waterline cleaning.
- LED indicators clearly show charging and fault status for easy troubleshooting.
- Low-maintenance, washable filter reduces ongoing costs.
Cons
- Not suitable for pools with sharp steps or raised drains, limiting compatibility.
- No user reviews available yet, so long-term reliability is unverified.
- Weight of nearly 14 pounds may make retrieval from the water slightly cumbersome.
The ABNEMEN Cordless Robotic Pool Cleaner is designed for above-ground pool owners seeking a hands-free cleaning solution. With a 180-minute runtime and smart navigation, it targets those who want to avoid the hassle of cords and manual scrubbing. This model is ideal for medium to large pools but comes with important caveats regarding pool design.
Standout features include the powerful 180W motor and 80 GPH filtration, which effectively remove leaves, dirt, and sand. The wall-climbing capability allows it to tackle slopes up to 45 degrees, and the auto-return function ensures it waits at the pool edge when battery is low. In practice, the sonar navigation maps cleaning paths efficiently, reducing missed spots.
Build quality appears solid with a durable track drive and reinforced PVC brushes. The sky-blue design is unobtrusive, and the top-loading filter simplifies maintenance. At 13.78 pounds, it is heavy but manageable for most users. The LED indicators provide clear status updates, adding to the user-friendly experience.
Potential drawbacks include its incompatibility with pools featuring sharp steps or raised drains, which may exclude some setups. The lack of user reviews means performance claims have not been independently verified. Also, the battery life may vary depending on pool size and debris load.
Overall, the ABNEMEN cordless pool cleaner offers strong value for above-ground pool owners who prioritize convenience and smart features. If your pool meets the compatibility requirements, it is a worthwhile investment for automated cleaning. Consider it as a reliable upgrade from manual pool maintenance.
Pros
- Extended runtime up to 270 minutes in Eco Mode
- Comprehensive 4-zone cleaning including waterline and shallow areas
- Ultra-fine 3-micron filtration for crystal-clear water
- Smart navigation with 11 sensors for efficient coverage
- 2-year warranty and strong brand trust
Cons
- App connectivity required for Eco Mode and scheduling
- Shallow cleaning limited to areas above 12 inches
- Weighs 17 pounds, which may be heavy to lift out of the pool
The Aiper Scuba S1 is a 2026 upgrade to Aiper's popular robotic pool cleaner line. Designed for pool owners who want hands-free maintenance, it tackles floors, walls, waterline, and shallow areas. With a 270-minute runtime in Eco Mode, it suits both daily upkeep and deep cleaning sessions.
The Scuba S1 uses 11 high-precision sensors and dual-path algorithms for smart navigation. Its WavePath cleaning pattern minimizes overlap while adapting to your pool's layout in real time. The dual filtration system combines a 3-micron ultra-fine filter with a 180-micron standard filter to capture everything from fine dust to leaves.
Caterpillar Treads provide strong climbing ability and mobility, allowing the cleaner to transition smoothly from floor to walls. The unit weighs 17 pounds and measures 15.3 x 8.7 x 17.5 inches, making it sturdy but manageable. App support adds convenience with Eco Mode, scheduled cleaning, and a weekly custom plan.
The cleaner requires app connectivity to access Eco Mode and advanced scheduling, which may not appeal to users who prefer simple controls. Shallow area cleaning is limited to areas above 12 inches, so very shallow shelves may be missed. At 17 pounds, lifting it out of the pool for filter cleaning takes some effort.
Overall, the Aiper Scuba S1 offers comprehensive coverage, long runtime, and excellent filtration in one package. It is a strong choice for pool owners who want a reliable, app-enabled cleaner with minimal overlap and maximum convenience. The 2-year warranty adds peace of mind for long-term use.
Color: Black
Dimensions: 15.3 x 8.7 x 17.5 inches
Weight: 17 Pounds
Runtime: Up to 270 minutes in Eco Mode, 180 minutes in Auto, Floor, Wall, or Scheduled modes
Filtration: Dual-layer, 3-micron ultra-fine filter and 180-micron standard filter
Cleaning Zones: Floor, walls, waterline, shallow areas above 12 inches
Navigation: 11 high-precision sensors, WavePath pattern, adaptive dual-path algorithms
Warranty: 2-year
Pros
- Efficient wall climbing ensures full coverage cleaning
- Active scrubbing eliminates the need for manual brushing
- Easy filter maintenance with top load basket
- Hassle free plug and play operation
- Trusted brand with decades of experience
Cons
- May require periodic filter cleaning during heavy debris seasons
- No information on cord length or tangle resistance
- Higher upfront cost compared to suction side cleaners
The Dolphin Proteus DX3 is an automatic robotic pool vacuum designed for inground pools up to 33 feet in length. It targets pool owners who want a hands off cleaning solution that tackles walls and floors without manual brushing. With a 4.4 star rating from the Dolphin lineup, it promises reliable performance.
The standout feature is the active scrubber brush, which actively dislodges dirt and algae from surfaces while being gentle on vinyl, fiberglass, and concrete. The wall climbing ability ensures no area is missed, regardless of pool shape. In real world use, the two hour cleaning cycle delivers a noticeably cleaner pool with minimal effort.
Design and build quality reflect Dolphin's 40 year legacy. The top load filter basket is conveniently accessible for quick debris removal, and the plug and play system means no complex installation. The unit weighs 14.8 pounds and measures 22.2 x 17.6 x 12.8 inches, making it compact yet sturdy for daily use.
One potential drawback is that the cord length is not specified, which could be a concern for larger pool setups. Additionally, during heavy leaf seasons, you might need to empty the filter mid cycle. However, for typical residential pools, the Proteus DX3 performs admirably without constant attention.
Overall, the Dolphin Proteus DX3 is a solid investment for anyone seeking an automatic cleaner that scrubs walls and floors effectively. It combines ease of use, strong cleaning power, and brand reliability. If your pool is under 33 feet and you value convenience, this model is highly recommended.
Pros
- Cordless design eliminates hose tangles and simplifies storage
- Long battery life covers large in-ground pools without frequent recharging
- APP control adds convenience and customization for daily or periodic cleaning
- Effective wall-climbing and waterline cleaning reduce manual scrubbing
- Dual filtration system keeps pool water clean and clear
Cons
- No customer reviews yet, so long-term reliability is unverified
- APP must be set before placing the cleaner in water, limiting on-the-fly adjustments
- Dimensions (15.9 x 15.7 x 11 inches) may be bulky for smaller pools or tight storage spaces
The Letexpool C1 is a cordless robotic pool cleaner designed for in-ground pools up to 1615 square feet. It targets homeowners who want a hands-free cleaning solution without the hassle of hoses or cords. With wall-climbing ability and seven cleaning modes, this robot aims to handle floors, walls, and waterlines automatically.
Standout features include triple motors and dual rolling brushes that provide strong suction and scrubbing power. The dual-layer filtration system traps fine dirt, leaves, and sediment, keeping water crystal clear. In real-world use, the 180-minute battery life covers large pools in a single charge, and the fast 2.5-hour charging minimizes downtime. The smart APP control allows you to switch modes and customize paths, though you must set it before the robot enters the water.
Build quality appears solid with a rugged Obsidian finish. The cordless design eliminates cord tangling and makes storage easy. However, at 15.9 x 15.7 x 11 inches, the unit is relatively large, so it may not fit in tight spaces. The lack of user reviews means we cannot confirm long-term durability, but the feature set suggests good value for the price.
A potential drawback is the app requirement: you cannot change settings while the robot is submerged, which may be inconvenient if you want to adjust mid-cycle. Additionally, the product is new, so customer support and firmware updates are unproven. For most users, the convenience of cordless operation and wall-climbing will outweigh these minor concerns.
Overall, the Letexpool C1 is a compelling choice for pool owners seeking an automated, cord-free cleaning experience. Its combination of long battery life, multiple modes, and APP control makes daily pool maintenance much easier. If you have a large in-ground pool and want to reduce manual work, this robot is worth considering.
Pros
- Cordless operation eliminates tangled cords and manual hose setup
- Wall and waterline scrubbing reduces hand-scrubbing effort
- Long 150-minute runtime covers large inground pools in one cycle
- Top-load filter basket simplifies debris removal and cleaning
- Auto-docking and quick-drain make retrieval convenient
Cons
- No remote control or app scheduling, so operation is limited to one-button mode selection
- At 26 pounds, the unit is still fairly heavy to lift out of the pool despite the quick-drain design
- Customer feedback is limited at this time, so long-term reliability is not yet independently verified
The EZIOOV U8 is a cordless robotic pool cleaner built for owners of medium to large inground pools up to 2,600 square feet. It is designed for anyone who wants automated cleaning of the floor, walls, and waterline without dragging hoses or spending weekends brushing. With a 150-minute runtime, the U8 can handle weekly maintenance in a single charging cycle.
The standout feature is wall and waterline scrubbing. Triple brushless motors and strong traction allow the robot to climb surfaces and remove grime, oil, and stuck-on debris that usually requires hand work. Gyroscope and ultrasonic sensors help it follow efficient paths and avoid obstacles while covering deep ends, corners, and ladder areas.
The 26-pound body feels solid in the pool, and the quick-drain design makes lifting easier after the cycle ends. Its 4-liter top-load filter catches fine dirt, sand, leaves, and larger debris, and you can empty the basket without turning the unit over. The carbon black finish looks clean, and a simple one-button control keeps the experience straightforward.
The main limitations are the lack of remote control or app scheduling and the unit's weight when removed from a deep pool. You choose a mode by pressing the button and let the robot do its work, but there is no way to steer it manually. Since this model has limited customer feedback available, long-term durability is not yet verified by extensive real-world use.
For pool owners who prioritize cordless freedom, wall scrubbing, and a long runtime, the EZIOOV U8 is a strong option. It simplifies routine maintenance and eliminates the tangles and setup of corded units. If you have a larger inground pool and prefer one-button automation, the U8 is worth serious consideration.
Pros
- Wall-climbing capability ensures thorough cleaning of pool sides and steps.
- Active scrubbing brush reduces manual labor and protects pool surfaces.
- Easy top-load filter access simplifies debris removal and maintenance.
- Quick plug-and-play setup with no complex installation required.
- Suitable for a wide range of pool shapes and sizes up to 33 ft.
Cons
- May not be ideal for very large pools exceeding 33 feet in length.
- Filter may need frequent cleaning in pools with heavy debris like leaves or sand.
- Price point is higher than some basic robotic cleaners, but offers advanced features.
The Dolphin Nautilus CC is a robotic pool cleaner designed to take the hassle out of pool maintenance. It is best suited for owners of above-ground or in-ground pools up to 33 feet in length who want a set-it-and-forget-it solution. With its wall-climbing ability and active scrubbing brush, this unit promises a thorough clean without manual effort.
Standout features include the top-load filter basket, which makes emptying debris quick and mess-free. The plug-and-play system means you can start cleaning in minutes: just plug it in, drop it in the water, and let it run for about two hours. Real-world performance is strong on walls and floors, though heavy debris may require more frequent filter cleaning.
Design-wise, the Nautilus CC is compact and lightweight at under 15 pounds, making it easy to lift in and out of the pool. The blue/black color scheme is standard, and the build quality feels durable. Dolphin has a legacy of reliability, and this model continues that tradition with robust materials and a simple interface.
One potential drawback is that the filter basket, while convenient, can fill up quickly in pools with lots of leaves or sand, requiring attention mid-cycle. Also, the price is higher than entry-level cleaners, but the added wall scrubbing and filter ease justify the cost for many users.
Overall, the Dolphin Nautilus CC is an excellent choice for pool owners who value convenience and effective cleaning. It delivers on its promises with minimal fuss, making it a worthwhile investment for maintaining a sparkling pool. If your pool fits within the size limit and you want to reduce manual work, this cleaner is highly recommended.
Pros
- Cordless and autonomous cleaning saves hours of manual supervision
- App control with 7 cleaning modes offers flexible customization
- Up to 180 minutes of runtime handles large inground pools
- Triple-motor and dual roller brushes provide thorough surface cleaning
- Dual-layer filtration keeps water crystal clear and reduces filter cleaning frequency
Cons
- App setup is required to access all seven cleaning modes, which may be an extra step for some users
- The 180-minute maximum runtime is only available in Eco Mode, which may limit cleaning power for heavy debris
- Best performance is limited to inground pools up to 1,615 sq ft, may not suit larger or above-ground pools
The TALOSBO C1 (2026 Upgrade) is a cordless robotic pool cleaner engineered for inground pools up to 1,615 square feet. It climbs walls, scrubs the waterline, and cleans the floor in a single autonomous cycle, making it an excellent hands-free solution for pool owners who want predictable results without tying up their weekend.
The standout performance comes from three motors and dual active roller brushes that aggressively remove leaves, sand, dirt, and stubborn debris. Its dual-layer filtration system traps both large particles and fine sediment, so your pool water stays noticeably clearer after each run. The smart mapping approach also adapts the cleaning route to your pool's shape, rather than bouncing randomly across the surface.
With up to 180 minutes of runtime in Eco Mode and a 2.5-hour recharge time, the C1 can handle most residential inground pools on a single charge. The companion app adds seven distinct cleaning modes and allows you to customize path patterns for corners, walls, floors, or waterline-heavy jobs. This level of control is especially valuable for pools with unusual geometry or frequently used hot spots.
Build quality feels solid, and the semi-gray blue color gives the unit a modern, subtle appearance that blends into most backyard environments. The compact footprint of 15.9 x 15.7 x 11 inches means it stores easily, though you will need to empty the filter and recharge the unit after extended use. Expect some maintenance between cycles, but far less than with a manual vacuum.
The TALOSBO C1 is best suited for inground pool owners who want a balance of power, smart control, and cordless convenience. It may not be the right choice for above-ground pools or those larger than 1,615 sq ft, but for its target size range, it delivers reliable cleaning and strong app integration. If you are looking to minimize manual pool work, this robotic cleaner is a competitive option to consider.
Pros
- Effortless filter cleaning with top-load basket – no need to flip the robot over.
- Active scrubber brush lifts and removes stubborn dirt and leaves without human intervention.
- Smart navigation adapts to any pool shape, reducing missed spots.
- Simple operation: plug in, drop, and let it work – ideal for pool owners of all skill levels.
- Lightweight and compact storage (18x22x12 inches).
Cons
- Cannot clean walls or waterline, so you may need to manually clean those areas.
- No remote control or app for custom scheduling – relies on its own navigation logic.
- Filter basket may need frequent emptying if pool is heavily debris-laden.
The Dolphin Nautilus AG (2026 Model) is a robotic pool vacuum tailored specifically for above-ground pools up to 33 feet in length. It aims to eliminate the manual drudgery of pool maintenance with a combination of an active scrubber brush and smart navigation. This is a solid choice for pool owners who want a set-it-and-forget-it solution without breaking the bank.
Standout features include the active scrubber brush, which actively agitates dirt and debris from pool surfaces, and the top-load filter basket that makes emptying a breeze. In practice, the robot navigates intelligently, scanning the pool to determine the most efficient cleaning path. While it does not clean walls or the waterline, it does a thorough job on the floor and coves, completing a cycle in roughly 1.5 hours.
Design and build quality reflect Dolphin's 40-year legacy. The unit feels solid yet lightweight at just under 15 pounds. The plug-and-play system means no complicated installation: simply connect the power supply, lower the robot into the water, and turn it on. The top-load filter is a thoughtful ergonomic touch, allowing you to remove debris without bending or flipping the unit.
Potential drawbacks are worth considering. The lack of wall and waterline cleaning means you'll still need to manually brush those areas. Also, the robot does not offer scheduling via an app or remote – it runs a fixed cycle each time you plug it in. For pools with heavy leaf or debris loads, the filter basket may require frequent emptying during the cycle.
Overall, the Dolphin Nautilus AG delivers on its promise of effortless floor cleaning for above-ground pools. It earns a 4-star rating for its reliability, user-friendliness, and performance. If you don't mind occasional manual touch-ups on walls and are looking for a straightforward, effective robotic cleaner, this is a strong investment.
Buying Guide for Robotic Pool Cleaners with Climbing Brushes
Wall Climbing Ability
Look for models with strong traction and responsive sensors. A pool cleaner with dedicated wall-climbing mode should be able to scale vertical surfaces without stalling at the waterline. Dolphin models are known for reliable climbing, while cordless options like the Aiper Scuba S1 use caterpillar treads to grip smooth surfaces. For more AIPER recommendations, browse our dedicated AIPER robotic pool cleaner collection.
Brush Type and Scrubbing Action
Active scrubbing brushes are key for removing stuck-on algae and calcium deposits. Some models use dual roller brushes, while others feature a single scrubber. The Dolphin Nautilus CC Plus uses an active scrubbing brush that is gentle on surfaces but tough on debris. Cordless options often combine dual roller brushes with powerful suction.
Runtime and Coverage
Cordless models need enough runtime to finish the job in one cycle. Look for at least 150 minutes for a typical in-ground pool. The CZYBYTE Cordless Robotic Pool Vacuum Cleaner and the Aiper Scuba S1 both offer generous runtime with app control. If you prefer a corded model, plug-and-play options like the Dolphin Proteus DX3 run indefinitely without battery concerns.
Filter System and Cleaning Maintenance
A top-load filter basket makes debris removal quick and easy. Fine mesh filters capture small particles like sand and dust, while larger baskets handle leaves. For a closer look at filter options, see our guide to the best pool robot filter for dirt and make sure your chosen model does not require flipping it over to empty the basket.
Navigation and Smart Features
Gyroscopes, ultrasonic sensors, and app connectivity help the robot clean in efficient S-shaped paths instead of bouncing randomly. The TALOSBO C1 and Letexpool C1 both offer multiple cleaning modes and app control. The Dolphin Nautilus CC uses smart navigation technology to scan the pool and determine the most efficient route. For more on active brush models, visit our roundup of the best pool robot active brush options.
Final Thoughts
Choosing the right robotic pool cleaner climbing brush comes down to pool type, cleaning habits, and your tolerance for cords. For a premium corded solution with proven wall-climbing power, we recommend the Dolphin Automatic Robotic Pool Vacuum Cleaner. If you want cordless convenience and app control for an in-ground pool, the (2026 Upgrade) Aiper Scuba S1 Robotic Pool is a fantastic choice. Both deliver thorough wall and waterline scrubbing so you can spend less time brushing and more time swimming.
Related Guides
- Best Robot Pool Cleaner Brand
- Best Robotic Pool Cleaner Climbing Brush
- How Do Robotic Pool Cleaners Map a Pool
Frequently Asked Questions
How long does a robotic pool cleaner need to climb walls?
Wall climbing usually starts within the first few minutes of a cleaning cycle. Most cordless models spend the initial portion scrubbing the waterline and walls before moving to the floor. A full cycle can take anywhere from 90 minutes to 180 minutes depending on the model and mode you select.
Can a robotic pool cleaner with a climbing brush replace manual brushing entirely?
In most cases, yes. A quality robot with an active scrubbing brush will handle algae and grime on floors, walls, and waterline. For heavily neglected pools, you may still need to spot-clean corners or stairs by hand. After that, the robot keeps everything spotless.
Are cordless robotic pool cleaners as powerful as corded ones?
Modern cordless models come surprisingly close. With triple motors and dual filtration, models like the CZYBYTE Cordless Robotic Pool Vacuum Cleaner deliver strong suction for fine debris and leaves. Corded Dolphin models still shine in large pools where continuous power is an advantage.
What is the best way to empty the debris filter?
Look for a top-load filter basket so you can open the lid and lift the basket out without turning the robot over. Many models include a 4L basket with fine mesh that captures everything from sand to hair. Rinse the filter with a hose and let it dry before the next cycle. For more tips, see our guide on robotic pool cleaner replacement brushes.
