ONE SIZE FITS ALL: The elastic silicone strap adjusts the fit, and the improved matte mask fits different face shapes, including men, women, teens. This snorkel mask has a very soft liquid silicone skirt that reduces water pressure on the face and seals the face well without worrying about leaks. Anti-Fog and Ultra Clear: Advanced lens shape design and anti-fog treated tempered glass mean you will have a crystal clear underwater experience, and the one-piece glass design provides better and wider underwater vision. Detachable and foldable dry snorkel: The snorkel set comes with an upgraded dry top snorkel for superior performance in breathing and air intake, so you can snorkel with confidence even when diving underwater , and you won't have salt water in your mouthRemovable splash guard, perfect for experienced swimmers and beginners. Food Grade Silicone Material: The scuba diving mask is made of soft food grade silicone which is very comfortable. The food-grade silicone nozzle can be comfortably inhaled into the mouth without any discomfort after prolonged use. Perfect snorkeling equipment for adults.