Lenses are treated to prevent fogging. Headband features ratchet adjustment for perfect fit. Foam padding forms a perfect seal to keep out dust and airborne particles. Headband features quick fit retainer. Interchangeable temples/headband included with each pair of V2G(R). Rigid temples also included. Meets the requirements of ANSI Z87.1+. SEI certified to CSA Z94.3 standards.