These Rendezvous Safety Glasses have an adjustable nose pad and the temples adjust to four different lengths. The lens/frame design allows air to freely flow and they have a 9.5 base curve lens. You can align lens angle to the proper position for work application with the ratcheting lens pitch adjustment. They have a scratch resistant polycarbonate lens which provides 99% UVA/B/C protection. These glasses pass the MIL-PRF 32432 High Velocity Impact Standards.