That be the critters, although the ones I saw close up appeared to be encased in some sort of vinyl covering. I cannot seem to recall if they were wearing light garments under their suits or what, I just know they were avoiding direct contact with their skin by having a barrier in place with the heat packs riding comfortable between the barrier and the inside of the suit. These guys do tend to get cold on ling dives, so to hear them report staying warm through deco (motionless, the ideal time for cold to set in) said a lot about the products they were using. I'll get in touch with them to see if they still have a copy of what they posted a few years back as well as any possible updates (I do know that both Gary and Moonfuzzy still dive wet.)