The SmartWool Merino 250 Base Layer returns this year as a back-to-back champion in our latest review of base layers. In over a year of searching, we still haven't found a product that quite stacks up to this one. The super soft merino wool featured in this model is so good, you might not believe it's actually wool until you check the specs. We are impressed with its warmth, breathability, and layering ability, but most significantly, its comfort and fit, which is why it wins our Editors' Choice award.
There is a special feeling we get when donning this all-star garment. The fabric is light and cozy with a gentle stretch that forms to any movement. Its comfort is combined with handsome styling and technical advantages that make it equally useful for a date with Eve or Everest. Our psych was only slightly tempered by small concerns about drying speed and durability, but when viewed across all our tests and analyses, this model is the top dog. Or top sheep?
SmartWool switched up the name on this top to "Merino 250 Base Layer," previously known as the SmartWool NTS 250. Other than adding some new color options, that's the only change. It's still available at online retailers in its old name, but know that it's the same shirt under both names.