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 easily drain your mask! Tempered lens, selected thickened high-transparency tempered glass, clear vision, anti-collision and compression, safe and durable Stainless steel frame, frame with stainless steel edging, stylish and timeless appearance, strong and durable frame Professional nose valve, unique nose valve structure, you can easily 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, imported silicone, soft and comfortable, no odor, curved structure on the face, close 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 shooting 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.