Leak-Proof Design: Specifically engineered to fit a wide variety of facial contours, these goggles feature high-quality silicone construction that ensures both a comfortable fit and a watertight seal, allowing you to swim with complete peace of mind-free from any concerns about leaks. Anti-Fog Function: The lens surfaces are treated with an advanced anti-fog coating that minimizes condensation and fogging without causing eye irritation, ensuring you maintain a crystal-clear field of vision throughout your swim. Eye Protection: A special coating applied to the polycarbonate lenses filters sunlight, effectively shielding your eyes from the harmful effects of solar radiation. Comfort and Easy Adjustment: The goggle strap is crafted from soft silicone and features a simple adjustment mechanism, making the goggles effortless to put on and take off. Additionally, the ultra-soft silicone nose bridge is designed to prevent any pressure or discomfort to your nose while wearing. Weight: 0.374 lbs.