Ergonomic design, lightweight, padded breathable mesh back with adjustable straps, simple straps help spread the weight around and give arms extra flexibility and movability, smooth & durable zippers, two bottle/ umbrella easy access pockets, both side buckles for holding tripod or umbrella, shoe pocket. Outdoor Products Arrowhead 46Ltr Hiking Backpack, Rucksack, Unisex,Camping. Multi day adventure backpack Color: Gray Gender: Unisex Backpack, Rucksack Hydration reservoir compatible with 2 or 3 liter hydration reservoirs (reservoir not included) Aluminum stays Side Compression straps Top hood includes two easy access zippered pockets Reinforced front carry handle making it convenient while loading/unloading. Padded shoulder straps with adjustable sternum strap Cool mesh padded back for added comfort Padded hip belt to support heavy loads Top drawstring closure Large zippered pocket on each side 47.5 Liter Cargo Capacity 20" x 12.7" x 8.6"