I have a similar long sleeve like this from Mountain Hardwear. I typically have a short sleeve (Also from mountain hardwear) under it. Sometimes I have an Under Armor under it if it really cold. The other day I went hiking at LeConte (a 6,500 feet mountain) and I wore my long sleeve Mountain Hardwear with my rain shell stayed plenty warm. Eventually shed the rain shell and stay comfortable until i got to the summit, then whipped out the insulated jacket. I guess i carry extra layers a lot. Two jackets (rain and insulated) long sleeve and short sleeve for all day hikes. I leave a change of clothes in car for when rolling into local watering hole after the hike. Backpacking trip it just depends on seasons and weather forecast.