Mens Merino 150 Baselayer 1/4 Zip

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Product Overview

Smartwool took the popular Merino 150 Base layer and added a 1/4 zip  to it—making it the perfect base layer for warm or cold weather. This  top uses the lightest-weight Merino fabric wrapped around a nylon core  to increase durability, while still keeping the 100% soft, Merino wool  you love next to skin. Side seams help minimize chafing while wearing a  pack and offer a body-enhancing fit. Select colorways feature a more  responsible plant based dye technique. This base layer is comfortable,  powerful, sustainable, and, frankly, do-it-all-able.  



  • Slim Fit
  • The lightest weight  Merino jersey fabric uses a nylon core to increase durability while  still keeping 100% Merino wool next to skin
  • Offset shoulder and side seams designed to increase comfort and minimize chafing while wearing a backpack
  • Side seams wrap to front for body-enhancing fit
  • Flatlock seam construction designed to minimize chafing
  • 8" (20 cm) center front zip with semi-locking slider
  • Indigo Blue colorway features plant-based dye technique


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