Durable Material: High quality zipper, Sewing thread reinforcement made from1608D lightweight nilon materials with durability, with strong hanging system to carry more items, provides extra strength and long-lasting performance with the lightest weight possible. Large Capacity: 36-55L capacity, include: 1 Internal compartment ,1 Middle pocket,2 accessorial compartments, and 2 outer functional pockets.In addtion , there are 2 mountaineering cane place positions and 2 Side pockets.The material is soft enough to enlarge the capacity.Can carry your needed things:such as cell phone, card holder, umbrella and clothes, one pair of shoes, books etc. Multifunction Backpack: Ventilated mesh padded back and shoulder straps and allows air to pass between your back and the pack, comfortable to use in long distance hiking, 2 adjustable straps, Firm buckles on the sides and bottom for hanging trekking pole, tripod, tent, sleeping bag, other gears and reinforcement. Ergonomic Design: Ergonomic padded shoulder straps and back support for best ventilation and easing burden. So backpack back up more light. Multiple Scenes:like Climbing, Camping, Cycling,Hiking Travelling etc. Choose this backpack close to nature and beauty, feel the charm of nature !