About this item 180 Panoramic Anti-Fog Snorkel MaskThe snorkel mask is made of single layer of tempered glass lens which can withstand the water pressure while snorkeling and diving. Our snorkel mask treated with anti-fog technology features impact-resistant tempered glass lens, providing 180-degree high-definition large vision. Food-grade Soft Silicone SkirtThe silicone nose-piece is super soft and flexible which is soft enough where it will not really hurt the face and durable enough where it can last for a long time. The silicone mouthpiece is ergonomically designed, comfortable and durable. When diving and snorkeling underwater, you can enjoy relaxing and free breathing. High Safety Impact Resistance:Our swim mask adopts tempered glass lenses which can offer excellent impact resistance, scratch resistance, and anti-dazzle properties, ensuring your safety while you're underwater. No Leakage for Any Face Shape and Head Size: The soft adjustable silicone strap and skirt mold can match your face shape, leaving no marks on your face, and ensuring a leak-free fit for almost any face shape and head size. Anti-fog lens and Soft Nose Cover: This scuba diving mask anti-fog lens prevents your mask from fogging up, ensuring a clear view of the underwater world. The soft nose cover helps non-swimmers breathe underwater, making it an excellent choice for beginners who want to explore the underwater world. NOTICE: The new mask needs to be treated to prevent fog. The methods are as follows (each method works) : 1.Soak the inner lens with children's shampoo for 10-20 minutes and rinse off with water. 2.Use toothpaste without particles, wipe some water in the mirror, and then wipe in circles, until the mirror is smooth and smooth, rinse clean, no greasy feeling. 3.Only for tempered glass lenses. Lighter evenly burns the inner tempered lens until black appears, pay attention not to burn the silica gel, and clean it after cooling, which needs to be repeated several times. Maintenance: Clean mask with fresh water after use every time. Put the mask in warm fresh water for some minutes After sea snorkel to avoid corrosion. Avoid to use soap or detergents to make visibility well. Keep dry after use. Don't place the mask under the sunlight directly. Don't use towel to clean the face lens, glasses cloth Is better. Don't place face lens touch the hard surface. ",