The scratch- and chemical-resistant, shatterproof polycarbonate lenses offer full protection from harmful UVA and UVB rays, and the vented design promotes air circulation and prevents fogging. The aerodynamic crystal brown frames are made of lightweight, durable Grilamid TR-90 nylon material, and feature adjustable, hydrophilic ear and nose pieces for a snug, custom fit. A hard zippered case and a soft microfiber bag are included. Note: Fototec lenses do not transition when inside vehicles because the UV protection in the windshield prevents the process.