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. Dry top eliminates water entry when submerged. Adjustable quick-release buckle. ",