Patented Forceflex technology flexes to withstand the most severe impacs. Lightweight, metal free construction. Soft touch temple surfaces for added grip and comfort. Ideal for any work environment including electrical. A great frame for healthcare and laboratory workers. Meets ANSI Z87-2+ (USA) and CSA Z94.3 (Canada) standards. 2 year limited warranty. Available in one size: A: 57/16.