Nose valve diving goggles, professional nose valve HD mask Designed for comfortable diving to make mask draining easier! Hold down the mask, lower your head, and exhale through your nose to clear water quickly and effectively. Tempered glass lens, made of thickened high-transparency tempered glass for clear vision, impact resistance, and durability Stainless steel frame with stainless steel edging for a sleek, durable, and long-lasting structure Features a professional nose valve design that allows easy mask clearing by simply exhaling through the nose while maintaining proper positioning Adjustable buckle strap for a secure and customizable fit, easy to use and comfortable during extended wear Silicone skirt made of soft, odor-free silicone with a curved facial contour for a snug, leak-resistant seal Color: Black Material: HD tempered glass, stainless steel, silicone Dimensions: 17 x 11 cm Package Includes: 1 x Diving Mask Note: Light and display differences may cause slight color variation between the image and actual item. Measurement may vary by 1-3 cm.