I dive a whites fusion suit with an MK3 undergarment with underarmor under that for temps to low 40's.

I just bought a set of xerotherm undergarments that I plan to use during upcoming cave course which include the vest, top, leggings and socks. Because I used fleece pants and a few undershirts with a crappy drysuit (not the whites) the first time I was in North Florida systems I have no idea how I will be once i'm actually in a cave for long periods of time. Hopefully not to warm, not to cold... The first trip was for a rebreather class.

I will be sure to let everyone know how warm they are once I get the chance to use them.

Garth