[【New CO2 Transportation Solutions Extra Safety】Unlike the traditional semi-closed CO2 tube design on the market SABRE COVE full face snorkel mask adults are designed with a fully enclosed CO2 outflow tube made of food grade silicone which is better for CO2 outflow. Better breathing circulation for safety anti-fogging and visibility. "【Innovative Silicon Bonding Technology Anti-fog】Instead of the traditional snap-on design our snorkeling gear for adults silicone mask is bonded to the view PC panel which provides better isolation from eyes and breathing air better anti-fogging and prevents the silicone surface from detaching over time thus better ensuring safety." "【One-piece Silicon Skirt Design Anti-leak】Traditional silicone skirts are designed to be stuck in the middle of the panel and are prone to leakage over long periods of time; Our SABRE COVE snorkeling masks silicone skirt is specially made to fit and fixed on the PC panel perfectly preventing water leakage;" 【Top Dry System】SABRE COVE Snorkel set adult is fitted with a one-way inhalation valve with 3 floating balls on top. Once underwater the orifice is closed by the floats allowing for quicker reaction to changes in buoyancy whether swimming or snorkeling. 【Buckle Folding Breathing Tube Design】Compared with the traditional hand-dismantled masks SABRE COVE full face diving mask adopts a buckle folding design which does not separate the snorkel tube from the mask itself effectively preventing the loss of the tube. At the same time it prevents the accessory from being broken due to the improper force used for installation and dismantling. Comes with a mesh bag ensures its portability and packability bringing more convenience to your trip.]