This NFPA 1971-2013 compliant wrap-around replacement strap is for ESS FirePro-1971 EX-1 and FirePro-1971 EX-2 structural firefighting goggles This two-piece strap is easily installed on any FirePro-1971 Series goggle frame It features ESS' patented Speed Clips, which make strap adjustment quick and easy, even with gloves on