This snorkeling full face cover helps you to breathe naturally and comfortably underwater,meanwhile you can enjoy and shoot the beautiful view underwater. Features: Transparent and clear plastic frame and face cover provide 180 degee wide field vision. Safe one-way breathing system: Fresh air enters the snorkel mask and the breathing tube, and carbon dioxide is discharged from the exhaust hole directly. The air inlet channel and the air outlet channel are separated from each other. Exhaust carbon dioxide does not flow back, and breathing is smoother and healthier. All dry snorkel tube with floating ball provides anti-leaking system,and prevents the water from entering into face cover. Rotate the orange knob in left direction to remove it off to connect your diving tank(not included) to the face cover with included connector. Convenient sport camera mount and provided fix screw,help you to plug you camera(not included) to capture unforgettable underwater journey. Silicone gasket for comfortable and leak-proof fit. Adjustable and anti-slip silicone head strap to fix on head firmly. Press the folding button to fold the face cover into compact size. Come with a storage bag,easy to carry and store. This is only for snorkeling,like practicing in the shallow beach or swimming pool. Specification: Size: (S/M) / (L/XL) (optional) Material: Silicone + Plastic Tube Length: 258.27mm / 10.2in Weight: approx. 700g / 1.5lb Package Size: 325*160*200mm / 12.8*6.3*7.9in Package Weight: approx. 1.05kg / 2.3lb Package List: 1* Snorkeling Face Cover 1* Storage Bag 1* User Manual 3* Spare Valve 1* Connector 1* Sealing Mouth 1* Rubber Ring 1* Fix Screw NOTE: The function of the floating ball floating automatically is just for the situation that the face cover is used alone.When using with your snorkel tank(not included),you need to manually push the buckle to lock the floating ball before snorkeling,which prevents the face cover from water entering.