u may think im crazy but ive been usin a 3:2 all winter wit one of those hoods with a rashguard and 5 mil gloves and booties and ive lasted about an hour and a half on average. Last monday, i paddeled out and stayed in for almost three. Id buy a 4:3 or 5:4 but I just dont have the money for it cuz i just ought an al merrick.