Lifebe BG Outdoor 40L Nylon Waterproof Backpack Bag Camping Hiking Travel Bag Day Packs Material: polyester fabric, waterproof tearproof lightweight 3D mesh sponge and solid reinforced shoulder,back breathable structure,waist fixation system,top and bottom external plug system,multiple layers and pouches are convenient to carry your stuffs Unique three-dimensional design, shoe bag storehouse Adjustable chest belt and waist belt Ideal for outdoor sports like hiking, camping, climbing, cycling,and travel use