1. FOOD GRADE SILICONE MATERIAL: The diving mask is made of soft, transparent or food grade silicone and high wearing comfort. The skirt made of environmentally friendly materials does not cause allergies on the face and is easy to clean after use. It is particularly suitable for long term use in diving without feeling uncomfortable. 2. CUSTOMER SERVICE: We you a 24 hour . We are convinced that we our ers a completely satisfactory experience. 3. NO FOGGING AND NO LEAKING: The snorkeling set uses the most stable dry swimming valve design and the flexible breathing tube makes breathing and emptying easier. The diving mask is made of tempered glass lenses that can block strong UV rays, and the lens surface has been specially treated against fogging. 4. CLEAR GLASS AND PANORAMIC VIEW: This mask is made of a single layer of tempered glass and is designed for snorkeling, swimming and diving. The rim is made of soft, hypoallergenic, transparent silicone. The ultra visibility provided by the single lens and the unusual shape of the frame extend in all directions.