Brand new to dry suits. Bought it Friday, dove it at Jackson Blue for a couple of hours (2 dives) then 2 salt water dives off of Panama City. I've already installed my p-valve in yesterday, looks great, now I need to figure out the condom size to use (obviously, the medium one supplied with the valve was way too small ) As far as undergarments I was diving an Underarmour shirt and a fleece plus my shorts and cheepo WalMart polyester socks. I was warm as the suit is thick and the water was about 70, but the squeeze was there as I had to get all the air out due to the underweighing issue. Overall very pleased with being dry, I just need more practice until I figure the right amount of weight for an AL80 in salt water.