Designed to stay on the ground while you work your latest boulder problem. Constructed of durable 1000 denier Cordura nylon in a volcano shape that naturally stands upright. The entire bottom panel is a zippered pocket to hold your keys, wallet, energy bar, etc. Throw some stones in the pocket on windy days to prevent it from blowing over. Other features inclue rim stiffiner, micro fleece lining, snug closure, elastic brush holder, and grab handle. holds several blocks fo chalk and booth hands can be chalked at the same time.