Why Choose Kids Snorkeling Mask? Easy to tube-grubbing The bottom flush valve allows water to be quickly expelled from the tube. Dry snorkel and one-way valve ensure easy breathing. The snorkel and mask set is perfect for snorkeling, diving, recreational swimming and underwater exploration. Convenient side buckle, adjustable side buckle allows you to adjust the headband to fit different sized heads. Reliable Tempered Glass Lens - Premium and durable material, safety tempered glass lens with 180 viewing angle. Enjoy the exciting underwater world with your family, your children and your friends. It's perfect for a vacation in the sun while you explore the ocean. Anti-fog coating for clear viewing Tempered glass lens for extra durability Frameless, low volume mask Low-Profile, easy-to-use strap adjustment Comfort-fit liquid silicone skirt Food grade silicone mouthpiece