- Two-way Waterproof Valve: This innovative valve automatically closes when submerged in water, ensuring that you stay safe while swimming. The fully dry anti-wave head features an automatic water stop system that prevents water from entering the respiratory tract, making breathing easier and safer during waves. - Silicone Strap: Designed for comfort and durability, the swimming mask features a soft, food-grade liquid silicone strap that is both environmentally friendly and safe. The adjustable mask buckles and flexible face skirt provide a customizable fit for a variety of face shapes and head sizes. - Safe Tempered Glass Lens: The diving mask includes a nose cover, perfect for those who struggle with nose breathing while swimming. An adjustment knob allows for high precision in securing the lens strap, preventing any accidental slips. - Eco-friendly Materials: Made from non-toxic, tasteless, and soft silicone, the mask is comfortable for prolonged use. The PC frame is lightweight, strong, and resistant to deformation. Additionally, the anti-slip buckle features a professional design for easy adjustments and ensures a secure fit. Use Scenarios: 1. Ideal for recreational swimming, allowing you to enjoy the water without the worry of inhaling water. 2. Perfect for snorkeling adventures, providing clarity and comfort while exploring underwater. 3. Great for training sessions, enhancing your focus on technique without distractions from water interference.