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.
- 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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