Hydration bundle includes a 1.5L bladder that is made by Hydrapak exclusively for Revelate, along with a Barnacle clip kit . The Hopper fits most adult sized bikes and many full suspension frame bikes with a vertically mounted shock. Single handed access with effortless magnetic closure. Single main compartment with adjustable magnetic closure. Internal structure sewn in top panel allows for versatile use in conjunction with cockpit bags. Daisy chain along top tube with adjustable attachment points . Made in the USA with domestic and imported materials.