This shirt has a great fit and feel to it. It fits comfortably snug while still being stretchy. The zipper is a nice touch for easy on-and-off, and the thumbholes will come in handy for extra warmth when running in cold weather, and for pulling the shirt on over a baselayer. It offers a lot of warmth while having more "give" than the traditional Shak. The colors (anvil gray with a green collar) are nice, too.