Canadian_Diver
Contributor
hoosier:I feel toasted by TLS350 and 400g thinsulate at 40s F water.
I couldn't bring myself to purchase the thermal insulation that drysuit manufacturers sell, they are all overpriced, and IMHO, don't work as well as some of the other options available out there.
I use Helly-Hansen Speiz one piece undergarment, in extremely cold water (38F), I wear a pair of thin one piece thermals (polypropylene / cotton polyester mix) under them. I stay toasty warm, and I spent less on 'em.