This climbing/ bouldering brush is made in Germany with beech wood and strong natural boar's bristles. It is fully biodegradable and sustainable. Length: 17 cm, brislte part: 5 cm. Bristles are arranged in a slight curve to better reach more of the stone, holds. Boulder brushes are used to clean holds that can be full of dirt, grease, rubber, chalk and grime, all for better grip. From a test of the best bolders is this quote: "It quickly became clear during testing that the old adage is true — boar’s hair is just better. Testers unanimously preferred the performance of hair-equipped brushes, and it shows in the rankings. Boars Hair is the crème de la crème of climbing brush materials. This bristle type will give your holds a deep cleaning and won’t leave behind a plastic residue." Made in Germany. Nessentials.