Lightweight Stainless Steel Frame; Anti-Scratch and Anti-Fog Multi-Layer TAC Polarized Lenses; Eliminates 100% of UVA/UVB light; High-Quality Stainless Steel Arms; Standard Stainless Steel Hinges; 100% FDA Approved; Impact Resistant. These sunglasses offer a lightweight stainless steel frame and durable stainless steel arms. The lenses are TAC polarized, anti-scratch, and anti-fog, providing 100% UVA/UVB protection. They are also 100% FDA approved and impact resistant.