Smartwool Men's Merino 150 Base Layer Long Sleeve

I went down one size to get a snug fit and it’s perfect. I wanted it to fit tight and it does. You can almost literally feel the warmth. Hate to take it off in the spring. Wear rhe bottoms too and they fit normally.

I use this as my night shirt. It helps me retain internal temperature as the night sets and the temperature drops, but doesn't overheat me when the temperatures rise.

Wear this as my baselayer every time I ski. The wool feeling took some getting used to, but after a wash it was not itchy. Warm, wicks sweat, solid layering shirt.

I ordered a large based on the size guide and it was skin tight. I’m 5’10” 198, fairly muscular. Definitely need a XL.

I bought this to run in when the weather is cooler. It's great at wicking away moisture. It is soft and light, but it blocks out the wind and cold remarkably well. I went for a couple runs with it and decided to buy a short sleeve version as well.

Best Kay for travel. Absolutely love the material.

Light weight and warm

Smartwool is now using a much thinner fabric for this product. I have owned four of these shirts before and even after many washings, they are thicker than this item when new. I returned it and am looking at other merino wool brands for a better quality fabric.