The Elite Survival Systems PULSE 24-Hour Backpack offers versatile functionality. The three large padded compartments are built with drainage grommets and compression straps. The front compartment includes an admin panel and a zippered mesh pocket, while two rearmost compartments fit three-liter hydration reservoirs. Lined with soft fleece, a flat eyewear pocket on the front of the pack protects your sunglasses. Durable 1,000-denier nylon and heavy-duty zippers with covered zipper chains prevent moisture seepage, keeping your belongings safe and dry. Perfect for all day carrying, this pack is made with adjustable S-shaped shoulder straps, sternum support straps and a vented back panel stiffened with an internal, air-weight aluminum spine. With this backpack, you get consistent support, stability and comfort.