Smartwool - Men's Classic Thermal Merino Base Layer 1/4 Zip - Running Lab
![](https://cdn.shoplightspeed.com/shops/614969/files/59210611/650x750x2/smartwool-mens-classic-thermal-merino-base-layer-1.jpg)
The men's Classic Thermal Merino Base Layer 1/4 Zip is one of Smartwool's heaviest base layer tops and a great choice for a variety of cold weather activities.
![](https://images.evo.com/imgp/700/180637/962444/smartwool-classic-thermal-merino-base-layer-1-4-zip-top-men-s-.jpg)
Smartwool Classic Thermal Merino Base Layer 1/4 Zip Top - Men's
![](https://cdn.shopify.com/s/files/1/2621/5296/files/download-_17_fceb5779-e202-428f-a406-8d9eb6f5aa6e_600x.jpg?v=1693575621)
Run Baselayers – Gazelle Sports
![](http://www.altitude-sports.com/cdn/shop/products/smt_20sw016356_7Epewter_20mountain_20scape_1200x1200.jpg?v=1690972601)
Smartwool Classic Thermal Merino Base Layer 1/4 Zip Boxed - Men's
![](https://cdn.shopify.com/s/files/1/1230/9376/products/smt_20sw016356_7E_7EBack_20Black_20Color_20Shift_480x565.jpg?v=1692089693)
Smartwool Classic Thermal Merino Base Layer 1/4 Zip Boxed - Men's
![](https://cdn.shopify.com/s/files/1/0367/0772/9547/products/smartwool-mens-classic-thermal-merino-base-layer-crew-04-m-shirt-903.jpg)
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Men's Classic Thermal Merino Base Layer 1/4 Zip
![](https://cdn.shoplightspeed.com/shops/614969/files/59928422/325x375x2/smartwool-mens-active-fleece-tech-pant.jpg)
SMARTWOOL - Running Lab
![](https://images.evo.com/imgp/zoom/180637/984238/smartwool-classic-thermal-merino-base-layer-1-4-zip-top-men-s-.jpg)
Smartwool Classic Thermal Merino Base Layer 1/4 Zip Top - Men's
![](https://cdn2.smartwool.filoblu.com/media/catalog/product/cache/42c4b26f1cd8cebc9ada7467d079943d/s/m/smartwool_SW016356M371_01.jpg)
Men's Classic Thermal Merino Base Layer 1/4 Zip col. Black