FULL FACE DESIGN - Our snorkel mask provides you a large view of 180 degree, opens up a new world of underwater adventure, and allows you to breath comfortably through nose and mouth during snorkeling ANTI-FOG AND ANTI-LEAK - separate inhaling and exhaling channels with anti-fog coating on the lens and anti-fog inserts, stop the top snorkel mask from fogging up, advanced leak-proof silicone sealing mask with floating ball prevents salty water from entering into swimmer’s mask CAMERA MOUNT DESIGN - the camera mount of snorkel mask adult anti fog enables you to install action camera and to record the dreamlike underwater world, you can share your wonderful adventure with your family and friends, snorkeling mask is also a perfect gift to them FRIENDLY TO BEGINNERS - full face snorkeling mask is easier to use than traditional diving mask and more friendly to kids, adults, beginners and youth; so you spend less time in learning complex equipment and you will have more time to enjoy snorkeling LIFETIME WARRANTY - we are professional suppler of snorkel mask and we have over 15 years experience of designing and producing diving mask, please contact us and get a free replacement or full money back if you are not satisfied with our maskPackage include 1*Snorkel mask 1*Storage bag 1*User manual 1*Accessories bag Accessories Show 1.Valve:There are 3pcs valves assembled inside mask,2pcs in the mouth part,1pc in chin part They are for breathing and pouring the water. 2.Removable Camera mount:If your mask is the with removable mount version,you can put Sport Camera(Such as GoPro camera) on this mount 3.A set of Nut and Screw:To fix the camera on the mount,this set is standard in high-end mask only. 4.A pair of earplug:To prevent the water to ears. Specification [ Weight ] 0.55kg/1.23lb [Material] Silicone,PC [Measure]37.6*19.6*22cm/14.8*8.6*7.7inch Warm prompt This mask s designed for surface swim(less than 10 feet). This snorkel mask is not intended for use in freediving,scuba diving or strenuous swimming,However, if you go completely under water, it would just depend on how long you feel comfortable under the water without having to come up for air!