100% Polyester Imported Full-featured internal-frame pack great for traveling light; spacious 28.9-Liter capacity with loads of pockets Adjustable padded hip belt and shoulder straps with sternum slider support heavy loads; four compression straps secure and stabilize contents Large main compartment with top and vertical entry, zippered waist pockets, and two oversized stretchy side pockets Durable polyester/ripstop fabric and internal aluminum stay for rugged outings; hydration compatible (reservoir sold separately) Backed by the Outdoor Products Plain + simple lifetime guarantee