Structure of This Backpack: Different compartments and pockets suit different requirements, to keep your stuff separate and organized, enough room for 3 or 4 days trips. 1 Elastic rope harness pocket to carry a tent, roll-up blanket, clothes, pens, sleeping bag, hammock and other gears 2 side pocket for water bottle or umbrella 1 front pocket for your ipad and books 1 bottom pocket and 1 zipper top pocket for other small items like sunglasses, cards, or cellphone Features: 【Hiking Backpack Structure】: The 70L large capacity camping backpack, main storage bag with elastic drawstrings that can expand the pack, it's roomy enough for you to put in sleeping bag, mat, hammock or shoes and luggage , one laptop compartment, one front zipper pockage and two side pocket for water botle or umbrella. 【High Quality System Assault Backpacks】: High Quality external expansion system designed to be used in attach other hiking gear , you can load pockets, water bottle bag, accessory kits and other. As 3 day assault pack, bug out bag backpack or camping hiking backpack. Assault pack backpack 【Waterproof Fabric】: Tactical military rucksack made of 600D oxford fabric and water resistant material, it is more durable and anti-scratch than traditional hiking backpack, belt and high quality zipper, tearable and durable. 【Comfortable Daypack】: Adjustable and breathable mesh shoulder straps with plentiful sponge padding help relieve the stress from your shoulder. Widened and thickened S-type shoulder straps and high elastic breathable back support for best ventilation and easing burden. 【Size & Lightweight】: Dimension 72* 35 * 17cm / 13.4*6.7*28.75 inches; This mountaineering backpack weighs only 2.86lb / 1.3 kg for easy carrying, and adding no burden to your travel. Suitable for camping hiking, trekking, traveling, hunting, camping, climbing, suitcase alternative, storing diapers, college. Occasion: Hiking, Camping, Hunting, Fishing, Trekking, Traveling, Climbing and other outdoor activity.