Layer up with confidence. The SmartWool AlpineFit Merino Base Layer Bottoms are crafted from 100% merino wool using a premium interlock knit for plush comfort, superior breathability, and long-lasting odor resistance. Whether you’re carving down slopes or trekking across frozen trails, these thermal leggings flex and move with you—thanks to the streamlined slim fit and thoughtful flatlock seam design that prevents chafing.
- Made from soft, moisture-wicking merino wool base layer fabric
- Engineered for warmth and mobility in alpine environments
- Perfect choice for layering under ski gear — a top rated thermal base layer for skiing
- Contoured cut fits various body shapes comfortably
Not sure how to maintain your merino wool base layer? Just wash cold with wool-safe detergent and lay flat to dry—simple as that.
Kenneth Ramirez (verified owner) –
Absolutely love the fit and feel—these are the best merino wool base layer bottoms I’ve ever owned!
Tracey Wilson (verified owner) –
I was searching where to buy SmartWool thermal leggings online and I’m glad I landed on these. Warm and breathable even on icy slopes.
Shaun Miller (verified owner) –
Comfortable all day with zero itch. The fabric feels great against my skin and they layer well under snow pants. Highly recommend!