This base-layer is perfect for any winter activity. You do not get over heated while skinning, or sidestepping on a traverse because it wicks away your sweat. The heat reflector actually works, and you can feel the heat come back to you on colder days. It fits very comfortably, and I even forget that I am wearing it. I have under armor cold gear, and I enjoy this base-layer more. It also has a great price.