U.S. Divers Dryview Full Face Snorkeling Mask for Adults - Distortion-Free 180 Vision, Shatter-Resistant Lens, Removable Snorkel and Travel Bag Included, Comfortable Silicone Skirt, (Black) Medium Durable shatter-resistant polycarbonate lens Silicone mask skirt provides excellent comfort and fit Removable snorkel for better transport Distortion free viewing window with flat profile and 180 degree field of view Sizes: Measure from bottom of chin to between the eyebrows. If less than 5 inches please purchase a medium. If above 5 inches please purchase L/XL Excellent used condition. Used for a vacation to snorkel and had the best experience! Sanitized and ready for the next adventure! Smoke free home I ship next business day