Delavala Snorkel Mask for Adults , 100% Food-Grade Silicone Full Dry Top Snorkel Set Anti-Fog Tempered Glass Scuba Mask, Professional Snorkeling Gear 180 Degree Panoramic View ?NEW SPORTY Snorkel Mask: The sporty snorkel tube design completely solves the problem of installing a non-folding snorkel mask, and the buckle is easy to break and easy to lose.? Individually dual-channel inhalation and exhalation silicone material is food grade to prevent fog. Adjustable elastic band design, suitable for head of all shapes and sizes.? It's time to buy a full face snorkel mask that allows you to breathe easily through your nose and mouth. No more worrying about all these issues. Just enjoy your diving trip.??Size options:S/M - from your eyebrows to smaller chin than 12cm(4.7")L/XL - from your eyebrows to chin over 12cm(4.7")??NOTE:1. This mask is suitable for snorkeling/surface diving, but not suitable for deep diving, free diving, high intensity swimming. Do not use it in high waves or fast flow.2. Store your beard, mustache and hair to avoid contact between your face and mask.3. Lift your head and let the water out from the valve at the bottom of the mask.4. When the water level line touches the ball at the top of the tube, it does not breathe properly, it is that the ball will float on and lock the air valve to prevent water from entering and the tube is full of water temporarily.5. Do not expose to direct sunlight or excessive heat for a long time.??Package as follows:Diving mask x 1Gopro Support*11 x Screw for Gopro InstallationReplaceable rubber gasket for ventilation *1Ear plug x 1.Instruction manual x 1.Bag x 1.