1.[180° PANORAMIC & ANTI-FOG] The anti-fog snorkel mask features one-piece glass design, the panoramic underwater view to catch more great scene. The impact-resistant tempered glass lens is 5 times that of ordinary glass, which can withstand the impact of sharp objects and deep water pressure, first. And the lens is specially anti-fog treatment, you can enjoy the crystal clear underwater world. 2.[HIGH-QUALITY DRY SNORKEL] Do you want a comfortable snorkeling experience? The snorkel adopts the most stable dry float valve design to ensure proper breathing and no choking. Even beginners can quickly get used to breathing underwater. When the top of the snorkel is immersed in water, the valve will seal the snorkel to prevent water from entering, and the valve at the bottom can drain quickly, and efficient. 3.[PERFECT FIT & NO LEAKING] The snorkeling gear for adults adopts a double-layer waterproof design to avoid leakage. The soft, feather-like silicone skirt fits the face curve perfectly without any gaps, so you won't worry about leaking or leaving red marks. Adjustable silicone straps help you achieve a perfect fit and watertight seal. This snorkel mask adult fits the faces of most men, women and youth without any stress. 4.[FOOD-GRADE SILICONE MATERIAL] Are you worried about skin damage and allergies? FRITTON snorkel set is made of high-grade liquid silicone, comfortable to wear, does not damage the skin. The hypoallergenic silicone skirt protects your face from allergies, easy to clean after use, especially suitable for long-term use in snorkeling. Food grade silicone mouthpiece enters the mouth without any discomfort.