Adults Dry Snorkel Set Panoramic Wide View Anti-Fog Scuba Diving MaskANTI FOGGING AND NO LEAKING: Snorkeling set use the most stable dry floating valve design,and the flexible breath tube is effortless to breath and drain,the diving mask is made of tempered galss lenses which can prevent strong ultraviolet rays,and the lens surface has been specially anti fog treatment. CLEAR LENSES AND PANORAMIC VIEW: This mask features a single layer of tempered glass lens designed for snorkeling,swimming and scuba diving,the skirt