From taking the chill out of cool morning bike rides to hiking to the summit of Quandary Peak, you need a versatile layer that works as hard as you do. The year-round Smartwool Men's Merino 150 Base Layer Short Sleeve is up to the challenge. The Smartwool Men's Merino 150 Base Layer Short Sleeve performs well on its own in warmer temps or layers up easily when cooler weather rolls in.
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