One layer and endless ways to explore, the Smartwool Intraknit All-Season Merino Base Layer Crew for women is the base layer you need. From fast-paced trail days to long tours in the mountains, this top is designed to keep you comfortable as the effort ramps up. A lightweight Merino wool and TENCEL Lyocell blend helps regulate temperature, wick moisture, and resist odors, while Intraknit technology combines targeted ventilation, insulation, and stretch in a body-mapped design that moves naturally with you. Breathable knit zones help manage heat during intense activity, and the streamlined fit layers easily beneath a midlayer or shell without adding bulk. Built for year-round versatility, Smartwool's Intraknit All-Season Merino Base Layer Crew is a reliable choice for hiking, trail running, ski touring, and other high-output adventures where comfort and mobility matter.
Lightweight, breathable construction for comfort during high-output activities
Body-mapped stretch for a close, flexible fit that moves with you
Streamlined silhouette for easy layering across changing conditions
Winter 2026/27 product
Smartwool Intraknit All-Season Merino Base Layer Crew - Women's
