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Mary, we can't find an expiration, they do meet NFPA standards 1951 for Tech Rescue, but we don't know of an expiration date for that standard.
Brad, the R5 is a non NFPA compliant helmet where the R5SL is a 1951 NFPA standard compliant helmet (which means it's a Tech Rescue helmet).
The R5 has a 6 point polyester webbing and a 3 point polyester chin strap
The R5SL has a 6 point poly webbing and a 3 point NOMEX chin strap,I don't know the difference in polyester vs. poly but the chip strap made in the nomex material is a selling point for the NFPA. Hope we have answered your question.
Sorry, no it does not.
we would recommend either of these 2 goggles from ESS;
both use a strap to go around the helmet and velcro to attach to the helmet, both meet NFPA standards, for more info check them out on our web page, just type the part number in the search area
Compliant to ANSI Z89.1 this is the only ANSI listing i could find
Chinstrap, Nomex w/Quick Release & Postman Slide