HEAD Mares Adult Barracuda Purge Mask, Scuba Diving Snorkeling Dive Mask Bevelled and Bonded Tempered Glass Lenses Comfortable, Liquid-Injected, Crystal Silicone Rubber Skirt One-Way Purge Valve for Easy Clearing of Water Easy-Reach One-Handed Nose Pocket for Ear Equalization Quick-release buckles make the mask easy to put on and take off