The Epoch Foam is a foam-backed performance frame. An essential piece of equipment for any motorsport enthusiast! Protect your eyes, block the sun and look great in this classic frame! The lenses shatterproof polycarbonate. Epoch Eyewear is a Veteran owned and operated company. We are proud to be a part of the Veteran community and build a company that provides jobs and great products. Clear lenses provide protection from dust and debris and also block harmful UV rays. Smoke lenses are best for maintaining the true colors of what youre looking at. They block the most amount of light, which will help to reduce eyestrain if youll be outside for an extended period of time. Yellow lenses are helpful in low-light conditions because they make an environment appear brighter. They also enhance contrast and depth perception and are great for overcast, hazy and foggy conditions.