My favorite dry suit is my 5 mil neoprene. (well it used to be 5 mil, after 8 years and 4 or 500 dives it may be a little less now) More comfortable then a wet suit and about the same drag (ie-significantly less then any bag suit). The wrist dump valve spoils you very quickly. The suit is actually less restrictive then any of my wet suits except the 2 mil shorty!