Polycarbonate Frame w/Elastic Strap & Coppermax Polycarbonate lens. Polycarbonate plastic is an extremely strong plastic that is often used in aircraft and motorcycle wind shields. It is also lightweight and extremely impact-resistant which exceeds the ANSI Z87+ standards for high-mass and high-velocity impact protection. 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. The Coppermax lens are great for outdoors usage, whether you are driving, hunting, shooting, or any outdoors activities.