The Hydros 40 wing bladder for doubles has a buoyancy of up to 18 kg/40 lbs.
The HYDROS is a double-walled donut bladder system with a quick-release dump valve, K-type inflator, Cordura 1100dTEX outer shell, Nylon 440dTEX inner shell, and YKK zipper. The eyelets are spaced 279 mm apart.
