SWAP ® MAG Clear fX2 Anti-Fog/1.5

"Diopter strengths available in 1.5, 2.0, & 2.5 in clear anti-fog and gray anti-fog lenses.
Change out the temples and head strap with the simple push of a button.
Foam-lined frame blocks dust and debris.
Venting channels in the foam help minimize fogging.The same exceptional features as the original Swap ® , now in a bifocal version.
Independently tested and certified by Underwriters Laboratories to meet ANSI Z87.1+ and CSA Z94.3. Meets ballistic impact resistance requirements for eyewear in US Military Performance Specification MIL PRF-32432 (GL)."