Outdoor Hiking Backpack 45L Nylon/Polyester Camping Two primary zipper compartments for spacious storage (45L Internal Capacity) Adjustable Hip Clasp With Convenient Zippered Pockets Adjustable Mesh Side Pockets For Compression Fitting (Water Bottles, Flashlights, etc...) 45L Nylon/Polyester Weather Resistant Material Durable & Lightweight Comfortable padded shoulder straps and breathable mesh back support