Cocoons - Polar TX lenses are the best lens available in an under $40 fit over sunglass. The lens is highly versatile and is available in dark gray, medium amber, and yellow. Polar TX lenses are durable and engineered to give years of service without scuffing or scratching under normal conditions. The visual acuity of Polar TX lenses is second to none at the price point, delivering distortion free optics and maximum polarization. The UV400 rating ensures that Polar TX will protect your eyes from harsh glare, isolating your eyes in a cocoon of filtered light. Polar TX lenses are warranted to be free from manufacturer's defects for one year.