Nickel Silver Frame w/ Spring Hinges & Coppermax Polycarbonate lens. The lenses feature 3 superb elements, which maximize the transmission of the colors your eyes see naturally. The result is visual acuity, contrast, and color that are unrivaled. Coppermax provides unparalleled contrast & superior color enhancement by filtering specific colors in the visible light spectrum. In turn, this results in crisper color & sharper images while maintaining a natural non-distorted color balance. Our lens reduces distracting blue light that causes eye fatigue & eyestrain. They also cut through glare & haze for optimum visual clarity since light transmission is approximately 15%. It blocks 100% of harmful UVA and UVB rays. It also has Anti-Reflective coating which is a violet-colored coating on the back of a lens that prevents sunlight from coming in from behind and reflecting off the back of the lens into the eyes. This coating is most useful on water or snow. On the front of the lens, it has a Flash Mirror coating for additional filtration. The Coppermax lens tint is a great contrast lens for driving & outdoor sporting activities such as hunting, shooting, golfing, etc.