This is THE perfect T shirt. It runs long, which is really great if you're tall and sick of T shirts that ride up if you move at all. (If you're short or short-waisted, I would seriously suggest buying this and getting it hemmed up a bit. it's that good.) The length makes it good for backpacking, as it sits properly and doesn't bunch up at the hip strap.Since it's thin wool, it's comfortable in a really wide range of temperatures and manages sweat well. In the metro grey, it's a light enough color that I can wear it from the low 50's to the high 70's and be comfortable. It's soft and comfortable against the skin. It does not smell (as many synthetic fiber shirts do after a while) and can be worn during travel or backpacks for days in a row. I wash it in cold water and hang to dry (dries quickly too).The sleeve length is very flattering and overall it's cut quite nicely. I'm gradually acquiring this t shirt in many colors as it really is perfect.