Check the listing for details. Camelbak M.U.L.E. Hydration Backpack D² Fit Grey & Black Excellent Condition. Color: Black, Condition: Pre-owned. Listed at 42.90 USD. The CamelBak M.U.L.E. Hydration Backpack in grey and black is a medium-sized backpack made from Ripstop Nylon material. It has a zip and buckle closure, with a 3L capacity perfect for hydration. It includes a divider system, multifunction compartment, lightweight design, hip belt, foldable feature, and various pockets such as an elastic pocket and external pockets. The backpack is insulated, water-resistant, and equipped with padded straps, making it ideal for hiking and camping activities. Perfect for both men and women, this CamelBak backpack is a reliable and versatile option for outdoor adventures. Brand new bladder never used, a few marks on the front of pack from getting moved around see pics.