These are the Bare Mens Drysuit #11942 Trigon Pee Valve Set Low Profile Features: Extremely low profile Total height: 32 mm, external height: 9 mm (outside of drysuit) Diameter: 49 mm Optimized sealing performance Pressure compensated No buttons or moving parts Easy maintenance Machined housing suit Use a pee valve and extend your bottom time. No use having loads of breathing gas when nature prevents you from concentrating. Long working hours and deco times are no longer a problem. Relieve yourself in a donned drysuit! Low profile pee valve with unique properties. The Trigon Pee Valve is developed for enhanced safety and comfort during long duration dives. The low profile minimizes the risk of getting caught in wires, fishing nets, rusted plates, rocks, equipment or debris during the dive.