Pyramex XSG Bifocal Goggles feature a flame resistant foam padding that forms a seal to keep out dust and airborne particles. Interchangeable temple/strap included with each pair. Strap has Quick Fit retainer for easy on/off. Design allows air to flow freely reducing heat. Exceeds the ANSI Z87.1-2010 HIgh Velocity Impact Standards. CAN/CSA Z94.3-07 certified.