The Brush Blog

The ChalkBlaster in the frame with a majestic sunset in the background.
Climbing Brushes: The Complete Guide to Choosing and Using One (2026)
The complete climbing brush guide: how bristles, size, and technique decide your friction, how the climbing brush evolved from a toothbrush to an electric jet-fan tool, and how to pick... Read more...
Half assembled chalkblaster on a wooden table with brushes laying around.
We Built It Wrong the First Time. Here's What Changed.
The first ChalkBlaster production run was slow and chaotic — on purpose. It exposed what CAD never could. Batch two ran 30% faster. Here's what we changed and why it... Read more...
The Part That Took 15 Tries
The Part That Took 15 Tries
The angle-adjustment system on the ChalkBlaster brush looks simple. It took 15 versions to get there. Here’s what obsessing over 4 parts actually looks like — and why you feel... Read more...
How We Make the ChalkBlaster 20% Stronger — For Almost Nothing
How We Make the ChalkBlaster 20% Stronger — For Almost Nothing
The ChalkBlaster is built to be abused — thrown, stepped on, and pushed through sessions that would break lesser gear. Here's the production step that quietly gives it 20% more... Read more...
A climber brushing at sunset with the most innovative climbing brush of 2026. This is the perfect gift for the boulder who got everything.
2026 Best Gifts for Climbers: 10 Things They'll Actually Use!
Buying for a climber is either easy or completely baffling. This list cuts through it — 10 gifts that actually get used in 2026, from pocket hangboards and premium skin... Read more...
Adam Ondra sitting in front a cordless fan during his bouldering session for Emotional Landscape 8C/V15, Photo byMartin Švec
Have Portable Fans for Bouldering Become Mainstream?
Adam Ondra just completed the most dominant bouldering run in recorded history V17 and four 8C flashes in 13 months. One thing showed up in almost every single session: a... Read more...
Should we ban electric climbing brush at competition?
I Was Banned From Using My Own Invention at a Competition
I invented a handheld electric climbing brush and brought it to the Danish Boulder Cup. An official told me I couldn't use it. When I read the rulebook, I couldn't... Read more...
Photo by Wolf Lieff. Super caked climbing hold. Lets make sure to brush after climbing.
Your Hands Are Dirtier Than You Think. The Unwritten Rules of Crag Etiquette.
Everyone brushes before they climb. Almost nobody thinks about what their bare hands do to a hold first. Seven rules of crag etiquette nobody handed you. Read more...
A complete tear down of the ChalkBlaster showcasing each parts
We Tried to Destroy our Own Product
We packed the motor with chalk, submerged it, blocked the airflow, and forced it to overheat. If it was going to fail, we wanted to be the ones who found... Read more...
We Built It Wrong 7 Times
We Built It Wrong 7 Times
Seven major redesigns, six months, and more broken prototypes than we'd like to admit — all bootstrapped from a workshop in Denmark. This is how the ChalkBlaster actually got built. Read more...
What Is the Most Innovative and Best Climbing Brush of 2026?
What Is the Most Innovative and Best Climbing Brush of 2026?
The 2026 lineup. Every brush that matters — and one beyond the category entirely. Photo: Sweep Climbing Quick answer For pure bristle performance: Sublime Original or Pamo. For the daily... Read more...
Every clap of chalk sends a cloud into the air you're about to breathe. Photo: Sweep Climbing
Air Quality in Climbing Gyms: Chalk, Rubber and Smarter Brushing
Indoor climbing air isn't just chalk — new research finds rubber particles from shoes in it too. Here's how to brush smarter, chalk less, and breathe easier. Read more...
Boar vs. Nylon Bristles: Which Climbing Brush Should You Use?
Boar vs. Nylon Bristles: Which Climbing Brush Should You Use?
Boar-hair vs. plastic (nylon) bristles compared: grip, rock safety, indoor use, durability, and when to choose each for cleaner holds. Read more...