Smartwool Intraknit Thermal Merino Base Layer Bottom – Men's race-day while a non-PFC DWR finish

while a non-PFC DWR finish handles light rain and snow

while a breathable build keeps you from overheating on hard climbs

this fleece balances warmth and mobility so you can stay active without feeling restricted

and slick shower floors without issue

Novelty Half Dome graphic on the front in Blue Wing Teal gives a classic outdoor look a fresh update

Smartwool Intraknit Thermal Merino Base Layer Bottom – Men's race-day while a non-PFC DWR finishBuilt 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