Safety Glasses - Gray Fog-Free Lenses. This protective eyewear has fog-free lenses, so you maintain clear vision in the toughest conditions and a lens coating to reduce scratching. The MILWAUKEE Fog-Free Safety Glasses have comfortable temple arms designed for extended wear. These fog-free protective glasses also have an integrated flexible nose bridge that provides you with more comfort. The yellow-tinted lenses make environments appear brighter, making them ideal for working in low light, while the gray lenses are best for transitioning between indoor and outdoor work.