Duckworth Polaris Crew

Best warm top

Specs

Weight 8 oz

 

From a distance, the Polaris looks like any other midweight baselayer, but closer inspection of its 80 percent merino/20 percent poly fabric reveals its secret sauce. It’s covered with raised squares of material, much like you would find in a fleece; each little interior cell creates a pocket of air that’s warmed by your body. They’re also more absorbent because of their additional surface area, so combined with wool’s natural wicking powers, this shirt felt drier and warmer than others we tested, even when we were sweating. 

m’s S-XXL, w’s S-XL