The ultra-lightweight Wiley X Sierra Sunglasses are the perfect blend of protection and contemporary style. Equipped with impact-resistant lenses and removable side shields that provide ANSI Z87.1+ level protection. The WX Sierra comes packed with several features that enhance all-day comfort and performance, such as dual-injected rubber temple tips, rubber molded nose pads, and built-in lens ventilation to help prevent fogging.FeaturesANSI z98.1+ Safety Standard Rating100% UVA/UVB Protection with Distortion Free ClarityLens Ventilation to Increase AirflowDual-Injected Rubber TemplatesLightweight FramePrescription Ready