Atama Backpacks are made of 100% cotton Gi material. They feature three pockets; 1) On the inside of the backpack that is vertical down the back with vents on the bottom, 2) On the front where the Atama logo is embroidered for keys, mouth guard, ETC, 3) At the bottom of the backpack for miscellaneous gear, there is padding at the bottom to keep your used, wet gear from soaking through the bottom.