Smartwool Classic Thermal Merino Base Layer 1/4 Zip – Men's Color:North Woods Foggy Pines 100% recycled fabric body —

100% recycled fabric body — warmth and durability without the environmental guilt

Built for runners who put in serious miles on technical terrain

High-tech grooves channel air and moisture away

the Arch Support Flip Flop is our top pick for athletes who refuse to wreck their feet off the trail

From the brand

Smartwool Classic Thermal Merino Base Layer 1/4 Zip – Men's Color:North Woods Foggy Pines 100% recycled fabric body —Built for cold weather output hiking, hunting, or moving fast in the backcountry this midweight merino base layer handles the full range of Southern winters. Merino wool regulates temperature naturally and resists odor through multi day wear, so you stay fresh without extra weight. The 1 4 zip lets you dump heat fast when the climb gets steep. Midweight merino wool construction balances warmth and breathability across a wide range of cold weather