[180 large field of view] Better field of vision, increasing the field of vision on both sides, a visual experience that other masks can not provide, a larger field of vision allows you to better enjoy the fun of the underwater world[Safety Reinforced Anti-Fog Lenses] The lenses are reinforced with polycarbonate and added with anti-fog treatment. Good impact resistance, drop resistance is higher than tempered glass. It has anti-ultraviolet function for better eye protection.[Comfortable and Waterproof] The skirt of the mask is made of soft food-grade liquid silicone, which fits the face better and will not cause pressure on the face. The double-layer waterproof design of the skirt can prevent water leakage.[Easy to Adjust] The side adjustment buckle is convenient, can be adjusted with one hand, gently press to adjust the length of the belt, the elastic silicone belt is suitable for different head shapes, widened design, more comfortable to wear.