Help keep your ski boots, hiking boots, and running shoes free of bulk and friction with our Men’s Classic Thermal Merino Base Layer 3/4 Bottom. 100% responsibly sourced Merino wool provides ultimate breathability and comfort, while a newly redesigned base layer pants fit helps reduce sag and excess fabric—perfect for your layering needs.
Base Layer
Smartwool Base Layers
Responsibly sourced, naturally performing Merino wool—helping you stay dry from sweat, resistant to odors, and comfortable at the right body temperature 365 days a year.
Features
- Our slim fit is intended to follow the contours of the body
- Fabric helps combine the moisture management, temperature regulation, and odor resistance of 100% Merino wool with interlock knit for comfort
- Flatlock seam construction designed to help increase comfort and minimize chafing
- Fully functional fly
- Merino-lined elastic waistband designed for comfort
- Size medium inseam: 21.5″ (55 cm)
- Made in Vietnam: 100% Merino Wool. Exclusive of Decoration.
- SW016365
Care
- Machine Wash Warm Gentle Cycle
- Wash With Like Colors
- Do Not Bleach
- Tumble Dry Low
- Cool Iron As Needed
- Do Not Iron Decoration
- Do Not Dry Clean
Classic Thermal
Our fan favorite base layer made from 100% ZQ Merino wool. Ideal for cold-weather activities where warmth and breathability are crucial.


































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