Polycarbonate lens VALUE SWIMMING GOGGLES PACKAGE--Swimming Goggles case + swim goggles + Earplugs + Nose Clip. With these items,you will be able to enjoy your swimming.The swim goggles fits most of people. ANTI FOG & UV PROTECTION --The inner surfaces of the lenses are anti-fog coated to prevent fogging. You will have a clear and wide sight under water. The outer surfaces of the lenses are carefully coated with ultraviolet-proof material, effectively protect your eyes from being hurt by bright sunlight, especially when you swim in the open air. NO LEAKING,FLEXIBLE & COMFORTABLE -- swim goggles have double -deck seal design and flexible silicone gasket frame construction to ensure a leak-proof seal. 3D ergonomic design fits your eye socket. Its well-designed buckle makes it easy to put on and take off swimming goggles. ENJOY YOUR SWIMMING--The Mirrored anti-fog goggles used poly-carbonate has incredible impact resistance. The nose clip and earplugs not only protect your nasal cavities and eardrum, but also improve your swimming performance. BEST QUALITY : Our swim goggles are designed to custom fit your smile. Quality is our main concern,if you have any question, please do not hesitate to contact us.