Inhale More Smoothly - Snorkel mask support 2 breathing tubes make you breathing more smooth compared with single tube snorkel. Feeding fresh air circulation by the mouth and nose together, air channels to maximize airflow and ensure mask stays fog-free,also stop salt water from getting into your mouth and prevents gagging. High Quality Material - snorkeling mask is Made of High-Quality PC and Medical Grade Silicone, Made of High-Quality PC and Medical Grade Silicone, New add fish gill design breath circulatory system, exhaust gas more faster, We are greatly improved the airflow and visibility. 180 Panoramic View - Snorkeling Gear can provide you with an excellent view better than standard diving masks, underwater breathe comfortably through your mouth or nose while snorkeling, The angled snorkel tube stays above water more easily and gives your head more freedom of movement. Adjustable size design - Everyone's face is different, So Full face snorkel mask adult sizing is important to get right. The size is measured from the nose to the bottom of your chin.if less than or equal to 4.72in(12cm), select size S/M. If more than 4.72in(12cm), select size L/XL. Foldable & Camera Mount Design - The snorkel tube is foldable and comes with 1 O Ring, 2pcs Earplugs, and a mesh bag, design camera mount on snorkel mask, so you can capture every wonderful moment in the sea and share it with your friends and family. Note: Please put the mask into the mesh bag after use to prevent the mask from being scratched on the beach and affecting the subsequent use. How wear? 1.Lift your hair back to avoid hair entering the inside of the breathing tube mask and causing a gap between the mask and the face connection 2.Put your chin into the inside bottom of the mask and press the bottom connection with your hand to check if there is a gap. After checking there is no problem it can be used normally. If you find that the mask does not fit your face well enough, you can adjust the tightness of the mask to your face by adjusting the expansion band. Note: Please put the mask into the mesh bag after use to prevent the mask from being scratched on the beach and affecting the subsequent use. How USE? For surface snorkeling only (less than 3 meters/10 feet). Do not wear this product for scuba diving, deep diving, or free diving. Hair or whiskers create micro spaces that allow water to seep in. ",