Soft Removable Nose CoverThe MoKo swimming goggles are equipped with a removable, soft silicone nose cover that allows you to remove the cover to breathe through the nose. It can also be plugged and turned into a diving goggle, perfect for children who don't know how to stop breathing by nose underwater! Full-dry SnorkelThe top of the snorkel has wave protection and waterproof valve design. The wave protection prevents water from splashing into the pipe; after the pipe is submerged in the water, the waterproof valve automatically closes the pipe according to the water pressure. It helps users to reduce the amount of water, breathe easily, use it comfortably, and prolong diving time. Safe & Clear Tempered Glass LensThis swimming mask uses high-quality tempered glass lenses, which are strong, safe and impact-proof. It can withstand deep water pressure for diving or swimming and also can withstand scratches from sharp objects, providing you with maximum protection. And the glass lenses are clearer than plastic lenses, allowing you to better enjoy the underwater world. Reinforced Snorkeling GearThis diving mask has a sturdy PC frame that holds its shape well during storage and enhances overall durability. The reinforced PC part prevents the mask from compressing underwater as you descend, thus preventing you from looking like a raccoon upon surfacing. Silicone Straps & Fits Most PeopleThe goggles for teenagers and adults are designed with silicone straps to fit different head sizes. The elasticated silicone straps also reduce pressure and will not cause headaches when wearing them, making them more comfortable for you to wear. The fixed buckle of the snorkel can also be fastened directly on the mask strap for quick adjustment and easy removal.