SmartWool Classic Thermal 1/4 Zip Baselayer Top - Men's

Frost-nipped mornings demand a foundation that does the heavy lifting before the sun even clears the ridge. This Smartwool 250g weight merino base layer acts as a reliable regulator, locking in core warmth while resisting the damp chill that builds during high-output climbs. The 100% merino interlock knit creates a dense, soft barrier against the skin, while the thoughtful construction—featuring flatlock seams and wrap-around back paneling—ensures you move through technical terrain without restriction or irritation. When the exertion level spikes mid-ascent, the quarter-length zip offers an instant heat-dump, allowing you to fine-tune your climate without stopping to shed layers. Whether you are navigating a sub-zero ski tour or hunkering down in a drafty alpine hut, the slim, body-mapped silhouette tucks effortlessly under a shell, proving that the most essential gear is the kind you stop noticing the moment you start moving. 
 
PRODUCT CONDITION
 
This Smartwool Classic Thermal 1/4 Zip Baselayer Top - Men's is in UnNew With Tags condition. 
 
Products in UnNew With Tags condition appear to be unused and still retain their original retail tags. While it has been passed down from a previous owner, it shows no signs of wear, use, or alteration and is in "like-new" condition.    



TECH SPECS

• Brand: Smartwool
• Material: 100% Merino wool
• 250g/m² fabric weight
• Interlock knit construction
• Flatlock seam construction
• 1/4 zip center front opening with semi-locking slider
• Slim fit contouring
• Wrap-around back body seam
• Set-in sleeves