Large Internal Capacity: 80L large capacity camping backpack, Ventilated mesh padded back area and shoulder straps for breathable and comfort. The main storage bag with elastic drawstrings to expand the package is spacious enough for you to put a sleeping bag, mat, hammock or shoes and luggage, a laptop compartment, a front zipper pocket and two side pockets for water bottle or umbrella. . Fabric: Made of 600D oxford fabric and water-resistant material, the tactical military backpack is more durable and scratch-proof than traditional hiking backpack, the belt and high-quality zipper are tear-resistant and durable. . Comfortable Daily Backpack: Adjustable and breathable mesh shoulder straps with abundant sponge padding help reduce the stress on your shoulder. Widened and thickened S-type shoulder straps and high elastic breathable back support for ventilation and lightening the burden. . Size and : Dimensions 13.46.728.75 inches (L x W x H); This mountaineering backpack weighs only 2.86 lb / 1.3 kg for easy carrying and will not burden your trip. Suitable for camping, hiking, trekking, traveling, hunting, camping, climbing, suitcase alternative, university. . System Attack Backpacks: external expansion system designed to attach other hiking equipment, you can load pockets, water bottle bag, accessory kits and others. It can be used as tactical assault pack backpack, 3 day assault pack, range bag, hunting backpack, hiking backpack, survival backpack, army backpack, Heavy duty backpack, Outdoor backpack, combat backpack, Emergency bag, assault backpack, trekking backpack for daily use.