CR-39 is a resin polymer (HD) lens that is half the weight of glass with excellent optical clarity. The lens is created by pouring liquid polymer into a mold of optically treated glass. This enables our sunglasses to obtain a lens with the same characteristics of the originating glass but less weight. Since it's more lightweight and thinner than glass, CR-39 makes for a more comfortable wearing experience and it is much more impact resistant.
Shop The Beacon, with CR-39 Lenses