MARCHWAY Tactical Molle Hydration Pack Backpack with 3L TPU Water Bladder, Military Daypack for Cycling, Hiking, Running, Climbing, Hunting, Bikingnylon Imported Streamlined and Compact Design: 19. 7x8. 7x2. 6 in size. Ergonomically fits for your shoulders chest and waist. 3 straps are all adjustable for reducing bounce. Soft air mesh back speeds up air flow and makes your back cool. Foam padded shoulder straps are extremely comfortable. Reliable Material: Heavy duty 1000 Denier water repellent nylon with superior wear resistance. Engineering plastic buckle is durable and impact resistant;