Intraknit Thermal Merino Base Layer Bottom – Men's

Built for cold-weather output on the trail or mountain, the Intraknit Thermal Bottom is our top pick for men who run hot in some zones and need real warmth in others. Body-mapped Intraknit construction zones merino insulation and ventilation exactly where you need them, cutting bulk without cutting warmth. Flatlock seams and a merino blend keep it comfortable skin-to-skin all day.

• Intraknit construction maps targeted insulation and ventilation zones to match how your body actually moves and sweats
• Merino wool blend delivers natural warmth, softness, and built-in odor resistance — no synthetic stink after a hard day out
• Flatlock seam construction sits flush against skin to prevent chafing under tight-fitting outerwear or hiking pants
• Elastic waistband stays put under a shell or softshell without rolling or bunching during technical movement
• Available in Charcoal Heather-Black — a low-profile colorway that works under anything and doesn't show sweat