Data wrote: They use 'anti freeze' technology for very very cold weather winter use....
Just jogged my mind about something I originally dismissed as sales baloney
I have some expensive Linstrand boots and they use a parrafin phase shift technology to keep them cool in summer and warm in winter. I just thought "yeah, right" but they do make a difference and I just wear the same socks all year now. In the summer my feet are certainly warm but they aren't cooked and sweaty like they were previously.The parafin is dispersed as microscopic particles like the nitrogen gas in Neoprene
The phase shift idea is to have microscopic bits of material that transmit heat well when they are warm and insulate well when they are cold by using properties that change during "phase shift", which is when something changes through solid/semi-solid/liquid. Certain properties only esxist in the material at certain temperatures and no longer exist at other temps. (Takes me back to studying phase shift diagrams for metal alloys - that really messed with my head to start with)
Sorry to be a bit off topic but the point is that I'm the biggest sceptic out there for this tech stuff but at least some of it does actually work