Nickel Silver Frame w/ Spring Hinges & Copper 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. 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.