Anti-fog and water-tight: The diving mask is made of tempered glass lenses to protect against strong UV rays, and the surface of the lenses has undergone special anti-fog treatment. CLEAR LENSES AND PANORAMA: This mask features a single-layer tempered glass lens designed for snorkeling, swimming and scuba diving, the skirt is made of soft hypoallergenic clear silicone, the single lens offers ultra-visibility and an unusual frame Shapes extend in all directions. Food-grade silicone material: The scuba diving mask is made of soft transparent or food-grade silicone, which has great comfort. The skirt of environmentally friendly material will not make your face allergic and is easy to clean after use, especially suitable for long-term wearing. Use it during freediving without feeling uncomfortable. Easy to use and suitable for most people: The mask is easy to adjust and has a small internal volume, perfect for deep freediving. The skirt is small, but the mask easily adapts to many face shapes.