3mm Lightwire peripheral frame tensions the mesh against your back and transfers the load from the harness to the hipbelt 3D tensioned mesh comfortably wraps and conforms to your body while providing excellent ventilation Mesh-covered, die-cut foam provides ventilation and an active, contoured fit Convenient panel access to the main compartment and internal mesh pocket Zippered front pocket with an internal mesh pocket and key fob Heat-embossed, scratch-free zippered slash pocket; dual-access side stretch-mesh pockets; zippered hipbelt pockets Helmet attachment loop doubles as a blinker light attachment; dedicated light attachment loop at bottom of pack Zippered, direct-access hydration compartment Dual upper and lower compression straps Stow-on-the-Go trekking pole attachment Integrated raincover Magnetic bite-valve attachment on the sternum strap Weight: 2 lbs. 8.2 oz. Dimensions: 20 x 12 x 11 inches