Mares Backpack Buoy Hydro Freediving Gear, Freediving BuoyBackpack Buoy HYDRO Premium Surface Support with Built In Storage Experience superior comfort and functionality with the Backpack Buoy HYDRO by Mares, available at Aquatic Sports. Designed for freedivers, snorkelers, and instructors, this innovative buoy doubles as a backpack, offering outstanding flotation, storage, and portability for open water training and exploration. Dual Function Design Combines a high buoyancy float with an integrated backpack