Eye Safety System offers Replaceable lenses for their safety glasses so that a scratch lense does not mean you need a new pair of glasses.

Specifications and Features:
Eye Safety Systems 101-315-002
Crowbar
Mirrored Gray Polarized
High-impact, 2.2mm polycarbonate Clear accessory lenses for the ESS Crowbar sunglass
Two Clear Crowbar lenses (right and left)
A protective lens pouch
Crowbar sunglass is sold separately
Crowbar lenses provide 100% UVA/UVB protection
Compliant with ANSI Z87.1-2010, U.S. MIL SPEC MIL-PRF-32432, U.S. Federal OSHA and CE EN166