The Hydro Sleeve is designed to carry a 100oz. water bladder and was adapted from the water carriage component of our MAG Pack. Based on end-user testing, the Hydro Sleeve performed exceptionally well, so we made it available to everyone. ItåÕs made of 330 Denier Corduraåª Fabric, so you know itåÕs durable, resistant to abrasion, tears, and scuffs. It has MOLLE positioned both horizontally and vertically for a variety of mounting options. We placed the cinch cords on both ends of the sleeve so you have the option of routing the water hose in either direction.