These sunglasses are designed to offer superior protection and comfort with advanced technology and thoughtful features: Lens Technology: High-definition polycarbonate lenses with 100% UV 400 protection block harmful UVA, UVB, UVC, and blue light, reducing glare for clearer vision. Lightweight Frame: Weighing only 34g, the flexible, heat-resistant, and UV-resistant frame ensures all-day comfort. Secure Fit: Non-slip rubber nose pads and legs provide a stable fit for various face shapes. Myopia-Friendly: TR90 frame includes a built-in myopia frame for customizable lenses, ideal for those with myopia. Fit & Sizing Sunglasses fit varies more between models than most people expect. Before ordering, compare the frame in the photos against a pair you already own and like the fit of. If you're unsure between two styles, size against the one you wear most.