I am 6'3" and 305 pounds. Thick legs and a good belly. Pants fit a tad tight but def wearable. I bought a 44". Love the feel. Not the quietest pant but similar to many of the other brands made today such as Cabelas high end pant. Stretchy in all areas except the waist. I like them a lot. Not cold weather but with layers you should be good in 30 degree weather if active. I live in Oklahoma and just got the pants and tried them on. Not used yet.