Swimming goggles with anti-fog coated lenses are treated with the latest eco-friendly anti-fog chemical technology for a worry-free swim. The anti-fog coating helps prevent your swim goggles from fogging up in the water and provides a large, clear field of vision. UV PROTECTION: These mirrored swim goggles feature polycarbonate lenses that are strong, crack-resistant, and have UV protection to protect against the sun's harmful rays, reduce the amount of incoming light, and help to minimize glare, providing outdoor swimmers with a more enjoyable swimming experience. Protection. The seal is made of double-layer soft silicone, which is comfortable to wear and prevents leakage. A good seal protects your eyes from chlorine and other chemicals in the pool as well as dirt, debris and bacteria, preventing eye irritation and bleeding. COMFORTABLE DESIGN: The black swim goggles are made with hypoallergenic silicone frames that mold to the shape of your face to prevent chafing and are comfortable to wear, helping to minimize marks around your eyes after swimming. One year warranty from the date of purchase. Caution Do not rub the lenses with anything during the process of cleaning your swim goggles. Instead, gently rinse the lenses and air dry as much as possible to avoid damaging the anti-fog coating.