Designed to help organize your backpack, SMD packing pods have a large zippered entry to keep your clothing, food, or gear laid out nicely where you can see everything inside. No need to pull everything out to get something or dig around to the bottom of the bag. Fully taped seams add water resistance to keep your things dry. This version is only sold in packs of 3 with random color combinations. These three-pack pods are size large in this pack. Note: Not intended for long-term immersion underwater.