Thermoplastic Elastomers framePolyvinyl Chloride lensAnti-Fog Coating coating1.Special Polarized Lenses & UV Protection Mirror Coatings: filter out irregular lights to avoid glare, protect your eyes from harmful UV rays. Making you see clearer and offering a obvious stereoscopic vision effect. It is a ideal choice for outdoor swimming, surfing and otherwater related sports.2.Full Silicone Frame & PVC Free: hypoallergenic, soft and durable, adopts to different face shapes with ultimate comfort; Self-adjusting TPR nose bridge piece ensures a comfortable fit and won't hurt your nose bridge; Anti slip dual straps reduce force to your head and increase the comfort.3.Superior Waterproof, NO Leakage: 3D silicone gaskets (made of safe&allergy free silicone) provide comfortable buffers and perfect watertight seals against eyes. No painful chlorine or salt water ingress. No worry about leakage and no raccoon eyes.4.Anti Fog Curved Lenses & Streamline Design: impact resistant PC lens with latest environmental anti fog chemicals technology, offer you a 180 unrestricted clear and comfortable vision without distortion. Streamline Design enhances your smooth swim performance. The safety glass technology also protects the lenses against falling and splintering.