We strive to provide our customers with the highest quality quality, contemporary touch, we hope you can enjoy it as much as possible! Material: Liquid silica gel + PC Children only: Nothing Specifications: S / m ( 12cm / 4.7in) (the maximum convex portion of the nose to the distance) Storage method: stored in a cool place away from sunlight Washing method: Detergent is required to clean the mask after use. Proper cleaning can maintain a clear visual and ensure normal ventilation to avoid atomization when using a mask. The full face snorkeling mask allows the user to breathe through the oral or nose while snorkeling without blowing mouth. As the breathing tube allows you to dive in depth. The main viewing vision helps to eliminate fog and will let your snorkeling gas flow. The ball of the tube will automatically seal the air valve to prevent salt water from entering the oral cavity and prevents the blocking of the mouth, and spends less time to worry about your mask and more time snorkeling. Hard plastic shell + double open plastic buckle, mini convenient, easy to arrive. Tagged anti-fog lens, encryption accuracy, increase clarity, more durable, scratch and impact. If you have any questions, please contact me, I will provide you with satisfactory service within 24 hours! Welcome to our store and get what you want! Looking forward to serving you! Because the lens lights and some objects may have a color difference, please understand. * Manual measurement can be understood by 1-3 cm error.