Smartwool Intraknit Thermal Merino Base Layer Bottom – Men's race-day while a breathable build keeps

while a breathable build keeps you from overheating on hard climbs

and slick shower floors without issue

elasticated rain-tunnel hood

or on the water — this is our go-to sun hoody for athletes who need all-day protection without overheating

Smartwool Intraknit Thermal Merino Base Layer Bottom – Men's race-day while a breathable build keepsBuilt 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