Help keep your ski boots, hiking boots, and running shoes free of bulk and friction with Smartwool'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.

• Slim fit is intended to follow the contours of the body
• 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance
• Flatlock seam construction designed to minimize chafing
• Fully functional fly
• Merino-lined elastic waistband designed for maximum comfort