Eyes protection: No worried about sunlight damage and blurry. Colorful coating on polycarbonate lenses can solve these problems. Lenses reflect sun rays, reduce glare, visual distortion, and soften brightness when swimming. Color coating & clear vision: The fogging-preventive coating on the lenses provide crystal clear underwater vision. Advanced technology can enhance your swimming experience, making you enjoy a softer light version under the water. Comfortable & leak-proof :3D ergonomic double-layer gasket fit your eye socket without leaving a mark around the eye skin and hurting your eye, and also avoids water from seeping in. You can swim freely without distractions! Easy to adjust: The strap is easy to adjust between sizes and the quick release clasp on the back means you can fit them in seconds without getting them tangled in your hair.