A technical done in a day hydration pack, the womens CamelBak Aventura provides easy zippered access to the reservoir via the back panel. 100-0z. OMEGA HydroTanium reservoir is made from a durable polyurethane film for exceptional tensile strength and burst resistance. Big Bite valve is ergonomically positioned for easy drinking and stays protected and clean inside the Bite Valve cover. Reservoir does not retain tastes or odors and is easy to clean and fill via the large, 3.5-in. opening. PureFlow delivery tube makes every gulp taste clean, not like plastic. With its separate zippered opening, the reservoir can be easily refilled without removing it from the pack insulated reservoir pocket keeps your water cool for hours. Main compartment holds lunch, gear and all your 10 essentials for a 1-day peak ascent. Large, zippered front pocket keeps electronics, cell phone or other valuables close at hand. Small zippered top pocket with fleece lining stores sunglasses or MP3 player. N.V.I.S. back panel offers multidirectional ventilation and a stable center of gravity. Padded shoulder straps, sternum strap and hipbelt provide maximum comfort and even load distribution. Dual side-compression straps help stabilize the load tool loop and lash point let you attach extra gear to the exterior of the pack. Made from rugged taffeta and abrasion-resistant ripstop nylon for long-lasting wear.