180Panoramic ViewSnorkel mask flat lens gives you a superior clear view enjoying clear and broad underwater view scenery of various fishes and other sea creatures. Easy Breathing and Anti-fogFull face swimming mask is equipped with double air-flow channels, inhaling and exhaling separate breathing chamber design effectively avoids air mixture and fogging issues, makes it easier to breathe naturally through your mouth or nose while snorkeling and will keep you snorkeling longer. Comfortable to WearOur Swimming Diving Mask is made of food grade liquid silicone to provide you a soft and tight fit to your face with no odor, the elastic fabric headband strap is easy to adjust to fit all sized head, also the rubber earplugs prevent water from entering your ears and balance the pressure by pinching nose to relieve discomfort when you dive into the deeper sea. Dry Snorkel Anti-Leakage TechnologyWhen the breathing tube is submerged in water, the floating ball will float up and block the inhaling tube to prevent water from entering; when rises above the water, the floating ball will fall and open the inhaling air way bring you a freely breathing. Product Quantity: 1 Piece Product color: green Product size: inner diameter: 19*13CM; outer diameter 23*19CM