Bouldering.com

A good brush is like a good soup, it's all in the ingredients. We use industrial-strength handles and bristles in our brushes, and our top-quality nylon bristle fibers are firmly anchored in stainless steel and will take tons of abuse without ripping out. For hard-to-reach holds, screw on an extension handle (steal one off of your broom or mop) and use the Big Bowl Brush. For general-purpose scrubbing, use the Medium Hold Scrubba, and for tiny edges and pockets, go for the tried and true M-16 Bouldering Brush.

Brushing the holds is key to optimizing your performance on the blocks by removing excess finger oils and unwanted chalk build-up. It is also important to remove excess chalk to lessen the visual impact of a hearty session and to leave the holds clean and grippy for the next climber ambling down the trail.