Lens and frame vented to increase air flow. Headband and temples feature ratchet adjustment for perfect fit, features quick-fit retainer. Interchangeable temples and headband included with each pair of V2G. Flame resistant foam padding. 9.75 base curved lens provides full side protection. Passes MIL-PRF-32432 High Velocity Impact Standards. STANDARDS & CERTIFICATIONS ANSI/ISEA Z87.1-2020 + High Impact CAN/CSA Z94.3-2020 CE/UKCA EN 166 MIL-PRF-32432