SmartWool Classic All-Season Merino Base Layer Bottom - Men's

From Nordic trails to brisk hikes, warm up your adventure with Smartwool's Classic All-Season Merino Base Layer Bottom. These pants are crafted from 100% merino wool for a soft, thermoregulating embrace against your skin. Plus, they're enhanced with a durable nylon core that gives this first layer the strength to keep up with you. With an updated fit, the All-Season Merino Base Layer Bottom works for a wide range of body shapes. Rely on Smartwool's lightest-weight baselayer for your next outing.

• Slim fit follows the contours of the body
• Flatlock seam construction minimizes chafing
• Merino wool is odor-resistant, comfortable, and breathable
• Merino-lined elastic waistband wicks moisture for fast dry times
• Winter 2026/27 product