Features: COMFORTABLE: Flexible silicone frame and gasket provides maximum comfort. SHATTER PROOF: Polycarbonate lenses stay strong even in the toughest conditions. Modified comfortable nose piece. EFFECTIVE: UV protection and anti-fog coating enhances your swimming experience. Convenient clip in the back. Recommended Usage Scenario: Mirrored lenses: Reflect light away from your eyes. Mirrored lenses provide a darker view. Suitable for swimming outdoors - especially in bright days swimming. Tinted Lenses: Reduce brightness by creating a darker view during bright indoor and outdoor swimming conditions.- not suitable for bright days or dimly-lit environments. Clear lenses: Offers protection and clear vision without changing the appearance of colors. - Ideal for indoor or low-light swimming situations. Note: this model might be too big for some of the small kids. Please be sure to measure the kid's head before purchase. TIPS for preventing fogging: All of our goggles lenses are covered by an anti-fog coating. By following these steps you can make the anti-fog coating last longer: 1.Always remember to rinse the inside lenses so the coating can work. Put goggles in pool water for a while before swimming. 2.NEVER wipe the lenses. 3.After swimming, wash the lenses with fresh water and then leave it to dry.