Built for big days and nonstop movement, Smartwool Men's Intraknit All-Season Merino Base Layer Bottom. Designed for active days in the mountains, these lightweight baselayer bottoms combine the natural performance of Merino wool with cooling TENCEL Lyocell to help regulate temperature, manage moisture, and control odor as your effort changes. Innovative Intraknit technology integrates targeted ventilation, insulation, and stretch to support unrestricted movement, while a streamlined fit layers comfortably under ski pants, hiking pants, or shell bottoms. Best worn for your days ski touring, hiking, snowshoeing, or tackling high-output winter adventures, Smartwool's Intraknit All-Season Merino Base Layer Bottom for men delivers next-to-skin comfort from the first step to the last.
Merino wool and TENCEL Lyocell blend for temperature regulation and odor resistance
Lightweight, breathable fabric for comfort during high-output activities
Stretch construction for unrestricted movement on the trail and in the mountains
Streamlined fit for comfortable, low-bulk layering under outerwear
Winter 2026/27 product
Smartwool Intraknit All-Season Merino Base Layer Bottom - Men's
