This is the Black Diamond "Capsule 20 Bouldering Bag." It has a capacity of 20L and a compact design that fits perfectly inside a crash pad. It features three zippered compartments for organizing and storing gear. It has a breathable shoe compartment to reduce odors. Retail price: 7700 yen I've only used it once. I used it with the shoulder strap, without placing it between mats. I did not put shoes inside. It will be shipped in simple packaging.