With their feminine silhouette and excellent fit the Native Eyewear Toolah Womens Sunglasses are great everywhere from on the trail to around town.. . . . . . . N3 Polarized Brown lenses for bright sunlight deliver the brightest field of vision, best contrast enhancement, and detail definition. 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. Strong, lightweight frame Ryhno Tuff Air frames. Cam Action hinges quickly lock into place so you're ready for action. Mastoid Temple Grip for a secure and comfortable grip behind the ears. Includes soft pouch for storage and cleaning. Best fit for small and medium sized faces .