Native Eyewear Sidecar Polarized Sunglasses, Crystal/Red Frame, Gray Lens Full frame, N3 lens style with interchange Sportflex lens Cam action hinges Fits Med-Large face Temple 128.5 mm Curve 8 base N3 polarized lenses filter blue light, minimizing haze so you get greater clarity, color and contrast Single snap-back interchangeable lens system Co-injected Rhyno-Tuff Air frames seemlessly incorporate our grippy, comfortable molding right into the plastic to help keep your shades in place Optimal fit for medium to large profiles Mastoid temple grips rest comfortably behind your ears on the mastoid bone