Classic All-Season Merino Base Layer 1/4 Zip - Men's (Spring 2024)

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Smartwool took their popular all-season merino base layer and added a 1/4 zip to it. This Smartwool base layer is amazingly versatile and perfect for unpredictable weather—working as a single layer when it's warm out and the perfect start for more layers when the sun begins to hide behind the clouds. With Raglan sleeves and a flatlock seam construction designed to minimize chafing, you'll be able to rely on constant comfort all day long.


Formerly known as the Merino 150 Base Layer 1/4 Zip. Packaging may have either name but the product is identical.


Brand Name:
Weight of Baselayer:
Light Weight
6.8 oz (193 g)
Mfg Sku/Part Number:
  • Our slim fit is intended to follow the contours of the body
  • Our lightweight Merino jersey fabric uses a recycled nylon core to increase durability while still keeping 100% Merino wool next to skin
  • 8" (20 cm) center-front zipper with semi-locking slider
  • Side seams wrap onto front for enhanced fit
  • Flatlock seam construction and offset shoulder and side seams designed to increase comfort and minimize chafing
  • Fabric: 88% merino wool, 12% nylon

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