Built for high-output cold-weather movement, the Intraknit Active Bottom is our pick for women who need warmth without the bulk. Body-mapped merino-Tencel construction wicks sweat and fights odor naturally, while strategic mesh panels move heat out when the effort ramps up. It runs slim enough to layer cleanly under anything.

• 52% merino wool, 21% Tencel, 20% polyester, 7% spandex — natural odor resistance and moisture management without synthetic stink
• Body-mapped Intraknit construction places ventilation exactly where you run hot, keeping airflow active during hard efforts
• Slim, form-fitting cut with a 25.5" inseam (size M) layers cleanly under shell pants or wears solo on milder days
• Midweight insulation hits the sweet spot for cool to cold conditions — enough warmth to start, breathable enough to finish
• Available in Twilight Blue/Pool Blue — a two-tone colorway that holds up after repeated washes without fading or pilling