I thought about semi-dry after I posted that; I know some who have used them that like them and some that hate them. Those I know who have gone the merino lined route love them, touting how warm they are compared to just neoprene, but they hate the stench after they have sweated in them a few times. Xcel makes an excellent wetsuit; have a couple of friends that use them exclusively for cave diving and swear they have yet to get cold. For their longer dives they just place heat packs inside and stay toasty throughout.