SODIAL(R) Adult Glass PVC Swimming Swim Diving Scuba Anti-Fog Goggles Mask & Snorkel Set Made of high grade Silicone and designed for optimum viewing from all angles The Silicone gasket and strap provide an enhanced fit and make it an ideal mask for swimming and crossover sports Ideal for swimming, diving, snorkeling and underwater activities Silicone swivel mouthpiece Quick-adjust strap