From summer lake trips to a blizzard on a winter snowshoe tour, the Inertia 25 is a loyal companion for a day outdoors. The generous main compartment stows bulky layers and gear, while stretch exterior stuff pockets handle overflow and small items.. . The pack comes with a 3 liter 3D Hydro Reservoir featuring Gregory's proprietary 3D QuickDry soft-molded technology, integrated drying hanger and anatomical fit and a dedicated hydration sleeve with SpeedClip mounting system. This hanger system allows one-handed, snap-and-go reservoir installation and stabilizes the weight in the center of your back. 100% Nylon. Mesh encapsulated ventilated back panel design keeps you cool and dry on the trail. Padded hipbelt and shoulder harness with ventilated air mesh for all day comfort. Load lifters on shoulder harnesses allow you to adjust the pack fit to ride close to your back and keep the pack stable. Men's and Women's specific hipbelt and shoulder harness designs deliver a tailored, customized fit experience. Integrated 3 Liter 3D Hydro reservoir. Dedication hydration sleeve with SpeedClip mountain system. Magnetic sterum strap for one handed buckling of strap and integrated magnetic linkage for the DryLock bite valve. Front and side mesh pockets for quick access to water bottles and an extra layer. Zippered quick access pocket with padded, soft touch lining for secure storage of valuables. Trekking pole attachment system. Custom comfort-grip molded zipper pulls. Dual Side Compression Straps. Dimensions: 20.1 in. x 11.5 in. x 8.5 in.. Weight: 1.59 lbs.. Imported.