The reinforced rim maintains the shape of the bag. The wide, round shape and supple fabric allows for easy access to chalk and is comfortable to use * Patented Petzl emergency whistle integrated into the cordlock closure. Elastic brush holder for cleaning holds. * Double loops for stability allow easy attachment to a belt or carabiner * Fleece lining distributes the chalk evenly and an internal gutter helps prevent accidental spills * Two sizes allow climbers to choose the best fit according to their hand size