Smartwool Men’s Classic Thermal Merino Base Layer 3/4 Bottom

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.