Special polarizing lenses and UV protective coatings: Filter out irregular light conditions to prevent glare and protect your eyes from harmful UV rays. So that you can see more clearly and get an obvious stereoscopic picture effect. It is an ideal choice for outdoor swimming, surfing and other open water sports.Full silicone frame PVC Free: hypoallergenic, soft and durable, conforms to different face shapes with ultimate comfort. The self-adjusting TPR nose bridge piece ensures a comfortable fit and does not hurt the bridge of your nose. Anti-slip double straps reduce pressure on your head and increase comfort.Excellent Waterproof: 3D silicone gaskets (made of safe and non-allergenic silicone) provide comfortable buffers and perfect waterproof seal around your eyes. No ingress of chlorine or salt water which could irritate eyes. No worry of water ingress and no raccoon eyes.Anti-fog curved lenses Streamlined Design: Impact-resistant PC lens adopts the latest eco-friendly anti-fog technology, giving you 180 clear and comfortable vision without distortion. The streamlined design improves your smooth swimming performance. Safety glass technology also protects the glasses from falling and shattering.