Best Climbing Brushes 2026: A Boulderer's Honest Roundup
I own eleven brushes. I did not plan to own eleven brushes. It happened the way it happens to everyone: you buy a cheap one, you lose it in a crash pad, you buy a nicer one, someone gives you a free one at a comp, you find a toothbrush in your car and it works surprisingly well, and then one day you tip out your gear bag and eleven brushes fall on the floor and your partner looks at you differently. So I'm in a decent position to tell you which ones I actually reach for — and which ones live in the drawer of shame.
The 10-second answer
The best climbing brush for most boulderers is a medium-head boar's hair brush with a solid wooden handle — it's stiff enough to clear chalk from real rock, soft enough not to polish holds, and it lasts years. Buy one good one (roughly $8–$15), plus one cheap toothbrush for pockets and mono-pockets, and a telescopic brush only if you climb outside on tall problems. Nylon is fine for plastic in the gym, terrible for texture on rock.
That's it. That's the whole article. Everything below is me justifying why I own nine more than that.
What actually makes a brush good
Before names and prices, three things decide whether a brush is worth carrying.
1. Bristle material
This is the whole game. Boar's hair is the standard for a reason: the individual bristles are tapered and slightly rough, so they grab chalk out of the pores in the rock instead of sliding over it. They flex and recover instead of splaying flat. On sandstone and granite they clean without abrading anything.
Nylon bristles are cheaper, stiffer, and harder. They're perfectly fine on gym plastic, which is basically indestructible. On soft sandstone — think Fontainebleau, Bishop, parts of the Southeast — hard synthetic bristles are how holds get shiny. Not in one session. Over a decade of thousands of climbers, absolutely. If you climb outside, this matters more than anything else on this page.
Horsehair sits in between — soft, gentle, good for delicate holds and for a final dusting pass, mediocre at shifting caked chalk. I keep one for a specific slopey problem I'm obsessed with. That is not a normal thing to do.
2. Handle
Wood beats plastic. Not for aesthetics — because a wooden handle takes a bit of chalk and stays grippable, while glossy plastic turns into a bar of soap the second your hands are damp. It also survives being stepped on, which is the leading cause of death among brushes.
Length is personal. I like something my whole hand wraps around so I can put real force into it, roughly the size of a small hairbrush. Tiny handles make you brush with your fingers, and brushing with your fingers is how you end up with a sore forearm before you've even pulled on.
3. Head size
Big brush head = fast on slopers and big volumes, useless in a two-finger pocket. Small head = precise, slow on a whole rail. Most people are best served by a medium head plus something skinny. This is why the toothbrush stays in the kit forever.
The roundup: what I actually reach for
Sublime — the one that lives in my bucket
If I could only keep one, it's this. Boar's hair, wooden handle, sensibly shaped head, and the build quality is the kind where the bristles are still standing upright after two seasons of abuse. It's not the cheapest brush on the list and it doesn't need to be — per session of use it's the cheapest thing I own. They also make a telescopic version that I'll get to.
Buy it if: you climb outside more than a few times a year and want to stop thinking about brushes.
Lapis — the crowd favorite, and fairly so
The brush you see in more chalk buckets than any other at a European crag. Boar's hair, wood, several head sizes including a genuinely tiny one for pockets. Nothing about it is fancy and everything about it works. Slightly softer feel than the Sublime, which some people prefer on delicate rock and I find marginally less effective on caked-up chalk.
Buy it if: you want a proven bouldering brush and like having a size range to pick from.
Mantle — the aggressive option
Stiffer, denser bristle packs. On a hold that's had forty people's chalk pressed into it in a comp-style gym session, this is the one that clears it in three passes instead of eight. That same stiffness is exactly what I don't want on soft sandstone. Right tool, specific job.
Buy it if: you're mostly indoors or on hard rock like granite and quartzite.
Metolius / Black Diamond bouldering brushes — the shop-shelf default
These are the ones you can actually walk into a gym pro shop and buy at 7pm on a Tuesday, which is worth something. Boar's hair options exist in both lines and they're fine. Genuinely fine. Not exciting, not bad, and about half the time the handle is plastic — see above re: soap.
Buy it if: you need a brush today and there's a rack in front of you.
A toothbrush — undefeated in pockets
Zero dollars if you have a bathroom. Nothing else fits a mono-pocket or a shallow two-finger slot as well. The nylon-on-rock objection applies, so use it sparingly and use it for placement, not for scrubbing away at soft stone. Every serious outdoor climber I know has one and nobody puts it in their "gear I recommend" list because it isn't cool. It's still in their bag.
Telescopic brushes — a real answer to a real problem
If your project's crux hold is nine feet up and you're currently stacking pads into a wobbling ziggurat to reach it, buy a telescopic brush. The good ones lock solidly and take a standard brush head so you can swap in your favorite boar's hair. The bad ones telescope back into themselves the moment you apply pressure, which is both useless and genuinely funny to watch. Try the lock mechanism before you commit if you can.
If you only climb indoors: you don't need this. The gym has one. It's behind the front desk and it's disgusting.
Quick comparison
| Type | Best for | Rough price | Watch out for |
|---|---|---|---|
| Boar's hair, wood handle (medium) | Everything, honestly | $8–$15 | Nothing. This is the default. |
| Stiff synthetic / dense pack | Gym plastic, hard rock | $6–$12 | Polishing soft sandstone |
| Horsehair | Delicate holds, final pass | $8–$14 | Weak on caked chalk |
| Toothbrush | Pockets, small edges | Free | Hard nylon on soft rock |
| Telescopic | High holds outdoors | $25–$60 | Cheap lock mechanisms |
The ones I'd skip
Wire brushes. I shouldn't have to write this and yet. Metal on rock is vandalism with extra steps.
Brushes with the bristles glued into a shallow plastic head — you can spot them because the bristle tufts look sparse and the head is thin. They shed. You'll find bristles in your chalk for months.
Anything branded with a novelty shape that compromises the head. Cute is not a bristle property.
And the free comp swag brush that everyone gets. Not because it's bad, but because you already have four.
Living with your brushes
Two habits and a brush lasts years.
- Store it dry, bristles up or sideways. Brushes stored bristles-down under gear get permanent bends and never clean well again.
- Rinse it, don't soak it. Cold water, shake it out, air dry. Hot water loosens the glue holding the bristle tufts in.
- Give it a home. A brush that lives loose in the bottom of a bag gets crushed, lost, and chalk-caked. A dedicated brush holder or an outside pocket solves it permanently.
That last point is a real design problem and — full transparency: we make one — it's part of why our CRACX Ascend bouldering chalk bucket has brush loops on the outside instead of letting brushes swim around in the chalk. Currently $59 as a launch offer instead of $79, free US shipping. If you already own a bucket you like, just tie a loop of cord to it and thread your brush through. That works too, and it's free.
While we're on containment: brushing kicks a surprising amount of chalk into the air, which is half of why gym bags end up looking the way they do. I wrote about that in how to stop chalk getting everywhere. And if you're still deciding what to carry your chalk in at all, the chalk bag vs chalk bucket breakdown covers the tradeoff properly. It also earns a slot on the bouldering gym bag checklist.
So what should you actually buy?
One medium boar's hair brush with a wooden handle. A toothbrush from your bathroom. If you project outdoors, a telescopic with a good lock. Total spend: under $20 unless you go telescopic.
Then spend the rest of the money on the thing that actually improves your climbing, which is a crash pad you trust and enough time off work to use it. No brush ever sent a problem. But a badly brushed hold has definitely stopped one.
Quick answers
Is boar's hair really better than nylon for climbing?
For outdoor rock, yes — meaningfully. Boar bristles are tapered and flexible, so they lift chalk out of the rock's texture rather than skating over it, and they don't abrade soft stone the way hard synthetics do. For gym plastic the difference is small enough that nylon is fine.
How often should I replace my climbing brush?
When the bristles stay bent after you flex them, or when the tufts thin out enough that you're scrubbing with the head instead of the hair. A well-stored boar's hair brush routinely lasts two to four seasons of regular use.
Can I use a toothbrush for bouldering?
Yes, and for pockets and small edges it's better than most purpose-built brushes. Just be aware that hard nylon on soft sandstone contributes to polish, so use it for precision work rather than heavy scrubbing.
Do I need a telescopic brush?
Only if you climb outdoors on problems where the key hold is out of reach from the ground. Indoors, the gym has one. If you buy one, test the locking mechanism under pressure before you trust it on a project.
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— CRACX
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Cover photo : Stuart Timms / Unsplash. Graphics by CRACX.