Heat Wave Lazer Face Z87 - Ring PolarizedThe Vise Z87 features an all TR90 construction and tightly holds form and function together, as the Vise Z87 meets ANSI Z. 87 mass impact requirements (and Z87+ with add on side shields) featuring 1. 9mm thick lenses to aid in protection against basic impacts and flying debris, which enables the Vise to transcend just that of a regular pair of sunglasses. Our lenses are injection molded from thick 1. 9mm shatter resistant polycarbonate that is built