Cold and unpredictable weather is no match for this quarter zip baselayer. Don't let the zipper fool you, because even though this LOOKS like a mid-layer type piece, it is 100% merino and therefore meant to be worn next-to-skin. Which really shouldn't be a problem, becuase it is hard to find a piece of clothing that feels better on your bare skin than an ultra-soft and ultra-stretchy top equipped with a vented front (I'm looking at you, Mr. Zipper). At one end, with its' high neck and thermo-regulating tendencies, this baselayer is perfect for the cold. At the other end, with its' vents, moisture wicking and anti-funk tendencies, this baselayer is perfect for sweaty days on the hill.