PlEASE NOTE!!!For your safety, please check whether the package is intact and whether the product is airtight after receiving the goods. If you have any questions please contact us first,thank you. For Adults:Features 1. NEW Design Double Air-flow Channels for Easy Breathing, inhaling and exhaling separate channels structure, assure there is enough oxygen stay in the mask and the carbon dioxide would flow out separately, allow you to breathe easily through nose or mouth under the water 2. 180 FULL FACE DESIGN - 180 Large viewing area lets you enjoy undistorted visibility and see breathtaking sights under the water clearly.With detachable GoPro Mount,can easily connect your camera to capture the movement around you in hands-free 3. ANTI-FOG & ANTI LEAK DESIGN: Our innovative anti-fog coating designs ensures the anti-fog effects up to 15,000 hours while the silicone fits your face snugly but softly to guarantees full water resistance, make sure you have a safe snorkeling experience 4. DRY TOP SYSTEMS: Dual tube with air valve allows holding your breath longer, breathe dry, would lock air inlet automatically when water entering 5. Adjustable mask: Adjustable Head Straps and 360degree adjustable respiratory systems, make you enjoy a comfortable and safe snorkeling trip. *Easy to use,just install the breathe tubes,camera holder and tear off the protective film before the mask, then slip the snorkel mask to your face, adjust the soft fabric straps, and you're good to go. Great for snorkelers of all skill levels*Easy to Breathe,feel free to breathe naturally through your nose or through your mouth with the snorkel mask. Once the mask is on, you don't even have to think about your breathing - simply enjoy the sea!*180 Panoramic Full View Sea Dive Mask with Dry Top, All of these masks give you a perfect 180-degree field of view with a fog-free lens.*A silicone seal applied to the edges of the best dry snorkel mask locks in the air & locks out water. No more seepage or leakage!PROPER USEThe full face snorkeling mask is specially designed for leisure snorkeling. It is only suitable for surface snorkeling and is not meant to replace any professional snorkel set and diving equipment. When snorkeling, you must rest regularly and follow the rules of partners: never snorkel alone. Before you go snorkeling, try it in the swimming pool to make sure it is completely sealed and fits your face.HOW TO CHOOSE SIZE ?If you are 3.35 - 3.94 inches or less (8.5 - 10 cm), recommend XS size (KIDS)SpecsCategory : Diving MasksMaterials : Liquid Silicone + PCColor:BlackActivity Diving / SnorkelingFeatures For Cellphone, WaterproofSize : XSNumber of Dive Mask Windows Single WindowGender UnisexPACKAGE INCLUDERegular style:1 * face mask1 * breathing tube2 * earplugs1 * nut1 spare waterproof ring1 instruction manualXS for 4~11 years kidsNOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won't be able to intercept packages in transit. Please understand.Refund note: Only return the product cost, not refund the freight!!!