Homdox Hot New 3.0L Outdoor Activities Travel Water Bladder Bag Backpack Hydration Packs Material: Nylon and Sponge, Occasion: Climbing, Hiking, Travel,Camping etc. 4 Colors: Black, Army green, Camouflage color, Gray Camouflage Feature: Two Layers (Water Bag and Outer Pocket) Gender: Unisex , Design: Cool , Water Bag Volume: 3L Package Content: 1 x Water Bladder Bag