Engineered for winter’s toughest demands, these men’s base layer bottoms combine premium merino wool with advanced Intraknit™ technology. The blend of ZQ-certified merino and durable polyester delivers natural warmth, moisture-wicking, and rapid drying for all-day comfort. Designed with seamless mesh ventilation zones, these pants keep you dry without sacrificing insulation.
- 54% merino wool, 43% polyester, 2% elastane, 1% polyamide for balanced warmth and stretch
- 3D mapping and articulated design enhance mobility for high-intensity outdoor activities
- Ribbed areas add durability where you need it most
- Smartwool’s slim fit follows your body’s contours for a sleek, comfortable feel
- Inseam length: 21.5 inches (medium size)
- Contains sustainable ZQ-certified merino wool
Whether you’re layering for skiing, hiking, or everyday winter wear, these are the best merino base layer for winter warmth and performance.
Heather Pearson (verified owner) –
I’ve tried many men’s base layers, but these thermal pants stand out for their perfect fit and warmth. The merino wool blend keeps me comfortable on cold hikes without overheating.
Thomas Smith (verified owner) –
Looking for cheap winter activewear for men that doesn’t sacrifice quality? These Smartwool thermal pants deliver excellent performance and breathability at a great price.
Charles Price (verified owner) –
After reading smartwool men’s base layer reviews, I decided to give these Intraknit pants a shot. They exceeded my expectations for mobility and moisture management during winter runs.