ANGGO Snorkel Set, Adults Recreation Anti-Fog Film Diving Mask Snorkel Set, Tempered Glass Diving Mask and Dry Top Snorkel for Swimming and Diving Lightweight & Comfortable Wear: hard mask frame with 100% soft silicone skirt, enables you feel fit and no leaking when snorkeling. With Anti Fog Film: Avoid fog appear on the inside lens with an exhalation from nose, making you see clear under water. Tempered Glass Lenses: 3.5mm thickness of tempered glass makes it strong enough for the pressure of water. One Size Fit All: Adjustable head straps and a high-grade soft silicon face skirt fit virtually any face shape. The ribbed design provides extra support and ensures a water-tight seal. Dry-top Snorkel: Splash-Proof Dry Guard Virtually Eliminates Water Intake.