Features: PC material has snorkeling, impact resistance and wear resistance. Transparent glass lens, high definition, drop resistance and wide field of view. For myopia patients, this glass can be replaced with a myopia glass. Food-grade silicone cigarette holder, harmless and anti-aging. The silicone valve plate has good leak-proof effect. Adjustable buckle and silicone strap, suitable for different people. specification: Material: Silicone, PC The package includes: 1 set of diving goggles 1 test tube