PRODUCT ADVANTAGES: The professional diving mask provides a 180 panoramic view underwater, making it easier to breathe when snorkeling, and helping you to understand the underwater world more clearly! Made of hard PC/liquid silicone/tempered glass, snorkeling mask is safe, non-toxic and odourless. The inside is soft silicone, which can protect your safety and will not give you headaches when worn for a long time. The elastic headband can be worn easily, suitable for a variety of head types. Release your hands to make you more free in the water. The snorkel has flexible water stop system, stop water completely.The ball on the top of the tube will automatically seal the air valve to prevent salt water from entering your mouth, and increase snorkeling time. Features: Tempered glass lens for clear view underwater. Comfort fit silicone skirt and nose part for leak-proof fit. Adjustable head straps fix on head firmly. Polycarbonate frame for durability. Imported Non-toxic silicone mouthpiece provide comfort. Dry top eliminates water entry when submerged. Adjustable quick-release buckle. Specifications: Mask Frame: PC Mask headband: Food grade liquid silicone Lens: Tempered glass size: 165 * 90mm Snorkel Mouthpiece, hose: Food grade liquid silicone Tube: PVC Other: PC FAQ: 1.Will it work if i have a beard? Answer: In general, the mask will perform best when you are clean-shaven. If there is some light facial hair you may experience some minor leaking, but the mask would still be usable. 2.Is there any age limit for users of this product? Answer: Don't use for the baby or kid less than 36 months, It will lead choking. 3.Does this diving mask have requirements for the water temperature of the environment in which it is used? Answer: We suggest that user is better wear the mask in Temperature 18~45'C water. 4. Can I breathe through nose and mouth? Answer: Our snorkel mask can only breathe through the mouth, the nose is the way to breathe Maintenance Clean mask with fresh water after use every time. Put the mask in warm fresh water for some minutes After sea snorkel to avoid corrosion. Avoid to use soap or detergents to make visibility well. Keep dry after use. Don't place the mask under the sunlight directly. Don't use towel to clean the face lens, glasses cloth Is better. Don't place face lens touch the hard surface. Notes: Please allow 1-2cm (0.4-0.8") differences due to manual measurement, thanks. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. ",