I totally love my new 4/3 hooded Xcel Drylock. Very comfortable and warm. Stay dry. Every time I've gone out this winter I wind up sweating in it. Along with Xcel 7 ml booties and 5 ml gloves. I'm sure the 5ml suit is even warmer. talked to someone who actually shifted from 5 to 4 ml cause their so warm. Alot has to do with fit as well.