Smartwool Merino 250 Base Layer Bottom – Men's Size:M A flexible build and grippy

A flexible build and grippy TPR outsole mean they can actually move — and stay upright — on slippery surfaces

100% recycled nylon with DWR finish sheds light rain and cuts wind on exposed ridges and open trails

A solid everyday tee for women who want something low-key they can feel good about wearing

Removable and breathable PU insole

while a high-traction rubber outsole handles slick winter surfaces with confidence

Smartwool Merino 250 Base Layer Bottom – Men's Size:M A flexible build and grippyBuilt for cold weather output on winter hikes, backcountry hunts, or camp mornings, the Merino 250 Bottom is our top pick for athletes who run hot and cold in the same day. 100% merino wool naturally regulates temperature and fights odor without chemical treatments, while flatlock seams keep things comfortable under a shell for hours on end. 100% merino wool construction delivers natural warmth, breathability, and odor resistance without synthetic