Ready to join the adventure with contemporary rimless style, Native Eyewear's Numa Sunglasses feature N3 polarized lenses for outstanding infrared light protection, acuity enhancement, and impact resistance. . Best fit for a medium profile. N3 Polarized Gray lenses suitable for extremely bright sunlight offer for all around protection maintain color saturation and natural contrast. 13% VLT Visible Light Transmittance the lower the number, the darker the lens. N3 Polarized Lens Technology: Blocks up to 4x more infrared light than regular polarized lenses, decreasing eye fatigue and reducing the likelihood of dry eyes Delivers high contrast, crisp definition, and peak visual acuity by significantly reducing blue light and selectively filtering UV for protection up to 400 nm Provides superior impact resistance for durability and protection to the ANSI Z87.1 standard. Optical quality polarized carbonate lenses provide 100% UV protection and eliminate glare from water, sand, pavement, ice and snow for sharp, clear vision. High performance thermoplastic Rhyno Tuff Air Frames provide lightweight durability to withstand high velocity collisions and temperature extremes. Co injected molded temples seamlessly incorporate molding into the plastic for superior grip and lightweight comfort. Venting incorporated into the frame design enhances airflow to eliminate fog and condensation. Cushinol nose pads ensure soft feel and custom fit, regardless of shape or size of nose. Cushinol temple pads create a nonslip grip that keeps sunglasses in place during athletic activity.