I wanted something that can help me stay warm during long hours sitting outside in cold.I do lots of long range shooting, especially in winter, that requires long motionless periods when trying to get my heartbeat and breathing under control. I would have 2-3 pairs of thermal underwear and eventually my lower back would be exposed to cold. I got the thermal suit and I love it. I am 5 feet 10 and 3/4 inch tall and weigh 196 lb. I work out quite a bit hence I would say my build is athletic. I have average torso/legs length. The suit fits me perfectly. Torso length is right on, pants legging is not too long and not too short. I looked for something like this for weeks. Money well spent.