Under Armour Men's ColdGear Infrared Shield Jacket Black (001)/Graphite S

I am 5'11 167, and a runner. I ordered the medium size, as I usually wear that size. When I received it, right away noticed it ran small. It was not just snug, it was tight, where I couldn't cross my arms. Granted, I do workout and have a larger frame, and the jacket should be a bit tight, however, was not for me. I DID exchange it for a large. I got it last night, and this morning went for an 8 mile run. I wore a UA compression shirt short sleeve, a long sleeve running shirt that is like a heat gear, and the new Large sized jacket. It was 22 degrees with a wind of 15mph, so, it was windy at times. As I ran, I felt very comfortable. The wind was NOT a factor for my upper body. (I wore a Balaclava) after about 4 to 5 miles, I actually had to unzip it a few times, as I was overheating. I think I had too much "heat retaining" gear on. After my run, I was really sweating underneath the jacket. The jacket is definitely not meant to be soft, it is a rough/tough jacket, (which is what you want) the zippers are large, and perfect, with plenty of room for phone/keys/wallet/even running gloves. I really enjoyed the jacket, its stylish, and performed well. The only suggestion is you may not need 2 layers underneath (at least heat gear wise.) If you are looking for a jacket to protect you from the wind, THIS IS THE JACKET , hands down. It's not heavy/bulky at all.