WZCPCV scuba mask one size fits all, adjust the elastic silicone strap to fit snugly, the improved mask fits different face shapes, including men, women, teenagers. Advanced lens shape design and anti-fog treated tempered glass mean you'll have a crystal clear underwater experience, and the one-piece glass design provides a better, wider field of view underwater. WZCPCV Snorkel Mask is made of food-grade silicone material, the food-grade silicone nozzle fits comfortably in the mouth, and can be used for a long time without any discomfort. Perfect snorkeling equipment for adults and teens.