REEBOW GEAR Military Tactical Backpack 3 Day Assault Pack Army Molle Bag Backpacks Rucksack 35L Approx. dimension: 12"*18"*11.2" (W*H*D) Capacity: 35L Material: Durable and water-resistant 600x600 Density fabric MOLLE system: Yes. Additional tactical pouches or gear can be attached on the MOLLE webbing to expand the capacity Zippers: Double-stitched, heavy duty zippers and utility cord pulls Side and front load compression system: Yes Ventilated mesh system: Padded on back area and shoulder strap and make them breathable and comfortable. Hydration compatible: Yes. it works great for a hydration bladder (backpack didn't include hydration bladder) as hydration backpack or outdoor camping hiking backpack. This tactical assault pack backpack can be used as 3 day assault pack backpack, range bag, hunting backpack, survival backpack, army backpack, trekking backpack or day pack for daily use.