Nose valve diving goggles, professional nose valve/HD mask Made for comfortable diving to make mask draining easier Hold down the mask, bow your head, and exhale forcefully through your nose to drain your mask Tempered lens, thickened high-transparency tempered glass, clear vision, anti-collision and compression, safe and durable Stainless steel frame, frame with stainless steel edging, and appearance, strong and durable frame Professional nose valve, unique nose valve structure, you can drain the mask by holding down the mask, bowing your head, and exhaling forcefully through your nose. Adjustable buckle strap, you can freely adjust the elasticity of the buckle, easy to use and comfortable to wear Silicone mask, silicone, and comfortable, no odor, curved structure on the face, to the face to prevent water leakage Colour: Black Material: HD tempered glass + stainless steel + silicone Size: 17 x 11cm Package Contents: 1 x diving mask Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.