Features: Clear View Underwater: The professional diving mask provides a 180 panoramic view underwater, making it easier to when snorkeling, and helping you to understand the underwater world more clearlyComfort fit silicone part for leak-proof fit. Adjustable head straps fix on head firmly. Made of silica gel for durability, 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 of head types. Release your hands to make you more free in the water eliminates water entry when submerged. 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 timeMaintenance: Clean mask with water after use every time.Put the mask in warm water for some minutesAfter sea snorkel to avoid corrosion.Avoid to use soap or detergents to make visibility well.Keep dry after use.'t place the mask under the sunlight directly.'t use towel to clean the face lens, glasses cloth Is better.'t place face lens touch the hard surface.Specifications: Mask headband: Food grade liquid siliconeLens: Tempered glassMouthpiece, hose: Food grade liquid siliconeTube: PVCMaterial: silica gelcolour: Black+transparentPackage Contents: 1 x diving mask1 x snorkelOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.