- 180-degree wide field of view with one-piece tempered glass: the adult snorkel mask features a single, thick tempered glass lens that is HD, shockproof and fog-free. The 180° panoramic design provides crystal-clear, distortion-free vision underwater, making it easier to explore the underwater world with confidence. - Nano anti-fog technology for clearer, longer-lasting vision: the diving goggles lens employs nano anti-fog technology that quickly dissipates water mist for more effective and durable fog resistance. The lenses are scratch-resistant to maintain a clear view underwater. After use, rinse with clean water and let dry naturally; keeping the lenses clean helps preserve the anti-fog effect. - Food-grade liquid silicone skirts for a secure, comfortable seal: the mask skirts are made from high-quality food-grade liquid silicone with a 3D design that conforms to facial contours. The double skirt creates a tight seal without gaps that could let water enter. The soft, liquid silicone minimizes red marks and skin irritation and is easy to clean after use. - Adjustable buckle design for a secure, comfortable fit: the snorkeling set uses an adjustable strap with side release buckles that can be easily tightened without excessive force. The one-sided tightening on both sides helps prevent accidental loosening, ensuring a secure fit even in active conditions. The strap is made of soft silicone to distribute pressure comfortably across the back of the head. - Practical use scenarios: - Open-water snorkeling on vacations or coastal trips, with a wide field of view for better reef and wildlife observation. - Pool training and practice sessions, benefiting from clear optics and a secure, leak-proof seal. - Snorkeling in calm rivers or lagoons where a comfortable, distortion-free view and reliable anti-fog performance enhance the experience. - Care and maintenance: rinse the lenses with clean water after use and allow them to dry naturally. Keep the lenses clean to maintain anti-fog performance and extend the life of the mask. - Product alignment: designed as an adult snorkel set with a focus on high-visibility optics, reliable anti-leak sealing, and comfortable, durable materials for everyday swimming and snorkeling activities.