When you need a technical backpack for your longest hikes, choose the High Sierra Sentinel 65 Backpack. Featuring a 65 liter, top loading main compartment with a gusseted drawstring closure and adjustable top lid, the Sentinel 65 Backpack has a front loading sleeping bag compartment with a divider and an internal hydration reservoir sleeve with dual exit ports for your tube. Providing maximum comfort, the Ergo Fit shoulder harness has adjustable load lifters and Vapel mesh AirFlow and high density foam padding, and the molded foam back panel has AirFlow channels to keep your back cool and dry. Dual contoured aluminum frame bars and adjustable side and bottom compression straps stabilize your load for ease of carry, and a waist belt and adjustable sternum strap offer additional load balance. Multiple pockets, like a hinged front pocket, removable media pocket, and dual mesh pockets, hold water bottles and other accessories, and soft lashing hardware lets you stash the rest of your gear. A tucked away rain cover provides protection against the elements.