Better grip with the MAMMUT Sloper Brush: The brush is designed for a secure grip both indoors and outdoors. Natural wild boar hair extends the durability of the brush. The soft hair prevents the rock from becoming damaged or polished. The shaft has a handle made from recycled plastic with an ergonomic shape for optimal grip. The angled brush head makes it easier to use. The Sloper Brush comes with practical sandpaper to keep your skin in perfect condition, ready for the next hold.