One of the biggest challenges in safety eyewear is the build-up of fog, from humidity and heated environmental conditions. There are two levels of fog protection: Hydroshield: This anti fog coating is permanently bonded to the goggles' lenses, and can keep them clear up to 60 times longer by repelling the moisture to the side of the lenses. The coating also provides scratch-resistance. Uvextreme: This anti fog coating provides anti-scratch, static resistance, and UV protection to the eyewear.