CVLIFE Outdoor Tactical Backpack Military Rucksacks for Camping Hiking and Trekking Medium Packs 40L 12 months warranty be offered, this tactical day pack is made of high density 600D Nylon material. Spacious capacity with main compartment measured 18.5*12.6*10.2 (inch). Assualt tactical backpack has side and front nynlon belt loading compression, patches webbing system, padding breathable back area, ventilated mesh padding and adjustable shoulder strap. Military tactical backpack can be used as 3 days assault back pack,combat backpack, military army backpack for men, survival backpack,ammo backpack or military sport bag. Military backpack has hydration compatible for a big hydration bladder(this product without hydration bladder)as hydration back pack or outdoor camping hiking backpack school backpack. Spacious tactical bags and backpacks has two main compartments and many small pockets. It can be used as a military back packs, range bag, trekking backpack, flashlight holster, tactical gears holder.