Commonly used around welding sites or for medium to heavy cutting and medium to heavy gas welding. Temples adjust to four different lengths and nose pieces secure the glasses to prevent slipping. 9.75 base curved lens provides full side protection without distracting seams or traditional type side shields. Scratch resistant polycarbonate lens provides 99% UVA/B/C protection. Passes MIL-PRF 32432 High Velocity Impact Standards.