Nature Climbing Brushes are made of white marblewood. The sides of the brushes are burned to make a beautiful contrast between the light wood and dark burned piece. On the backside we attach a piece of walnut wood or granite with an engraved logo. The hairs on the brushes are 18 mm long and the holes are made very close to each other to create smooth and effective brushing. The hairs are attached by hand, which ensures superior quality and durability.