Nemesis Safety Glasses, Black Frame, Shade 3.0 Ir/uv Lens Sporty, flexible, lightweight design that your employees will be happy to wear; they have a stylish look and feel. Lightweight construction. Polycarbonate lenses provide 99.9% UVA/UVB/UVC protection. Patented FLEX-DRY* designed to be extremely flexible, to channel sweat away from the eyes, and to help prevent slippage down the nose, all for long-term comfort.