Durable Aluminum Frame; Anti-Scratch and Anti-Fog Multi-Layer TAC Polarized Lenses; Eliminates 100% of UVA/UVB light; Hypoallergenic Aluminum Arms with Acetate Tips; Adjustable Nose Pads for a Comfortable Secure Fit; Spring-Loaded Stainless Steel Hinges; Optical Quality Polarization Triacetate Cellulose (TAC) Polarization Process; 100% FDA Approved; Impact Resistant;