Dielectric. Interchangeable temples and neoprene strap. Temples adjust to three different lengths. Frame features a rubber gasket. Passes Ballistic MIL-PRF-32432 High Velocity Impact standards when worn with strap. Passes D3: Droplet and Splash Test when worn with strap. Passes D4: Dust Test when worn with strap. Custom imprinting available. STANDARDS & CERTIFICATIONS ANSI/ISEA Z87.1-2020 + High Impact CAN/CSA Z94.3-2020 CE/UKCA EN 166 MIL-PRF-32432