High Sierra Pathway 40L Internal Hiking Frame Backpacks are designed for comfort and made for easy carrying of your gear. The backpack has a designated hydration bladder spot with a clear marked port for the hose (hydration bladder sold separately.) These packs feature padded airmesh shoulder straps and backpanel and are adjustable to make sure the bag fits you properly. The weight is evenly distributed so you can hike for miles with out discomfort. The pack is extremely durable and is water resistant so all your gear will stay organized and secure without getting wet. This 40 liter hiking backpack from High Sierra features deep zipper access to large main compartment; includes a large front zippered pocket with internal organizer and stretch mesh exterior pockets.