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Classic Thermal Merino Baselayer Bottom - Men's
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Classic Thermal Merino Bottom delivers warm, breathable winter layering
What Our Gearhead® Experts Are Saying:
"These are my go-to baselayer bottoms when I know it’s going to be freezing. The merino is super soft, never itchy, and the temp regulation is amazing on long tours—I don’t overheat on the climb, but I stay warm on the descent. They also don’t get funky, even after multiple days of riding."
We rely on the Classic Thermal Merino Baselayer Bottom when winter sends bitter cold across the mountains and we need the warmest foundation for long days outside. Smartwool’s premium merino wool keeps us insulated without feeling bulky, regulating body temperature whether we’re pushing hard on a skintrack or sitting still on a windy chairlift. Its natural breathability and softness make it a layer we forget we’re wearing—until we appreciate just how warm we feel in icy temps.
Flatlock seams prevent chafing during high-output movement, and the slim fit layers smoothly under our shell pants for streamlined comfort. Thanks to merino’s natural odor resistance, these baselayers stay fresh through multi-day missions, hut trips, and back-to-back powder days alike. Cozy, functional, and built for true winter conditions, they’re a cold-weather essential.
Details
- Warm merino baselayer bottom for skiing, touring, and winter adventures
- 100% merino wool offers breathable, temperature-regulating comfort
- Midweight construction ideal for the coldest conditions
- Naturally odor-resistant for multi-day trips
- Flatlock seams prevent chafing during movement
- Slim fit layers easily under shell pants
- Soft elastic waistband stays comfortable all day
- Item #SWLZ870
- Material
- 100% merino wool
- Insulation Weight
- mid
- Fit
- slim
- Anti-Odor
- natural attribute of merino wool
- Claimed Weight
- 8.04 oz
- Activity
- skiing, snowboarding, hiking, winter camping, mountaineering
- Manufacturer Warranty
- 2 year
Go Far. Feel Good.
Smartwool makes comfortable, capable Merino wool socks and apparel to add comfort and confident to any adventure.
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