The Ossa was designed to keep those who require prescription frames safe. This over-the-glass (OTG) safety eyewear was designed with compliance, comfort and function in mind. 

• ANSI Z87.1+ / CSA Z94.3 standards compliant 
• Fits over frames up to 135 mm wide.
• Vented temples 
• Lenses block 99.9% of UVA/UVB/UVC rays