Heat Wave Visual Vise Z87 Sunglasses. The 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. Heat Wave put the sunglasses game in a choke hold with the Vise®. Uncompromising and bold, the superior design of the Vise® is evident with its hard lines, squared up shape and relaxed fit. 1.9mm thick Polycarbonate lens that meets or exceeds mass impact requirements for Z87 standards, injection molded to the highest standards and tested to ensure optimal clarity, along with color and light transmission standards. Imported.