Gear up for your frosty backcountry escapades with The North Face Summit Series Pro 120 Crew - the ultimate weapon against chilly conditions when high-output is demanded. Engineered with sleek seams for seamless comfort and featuring moisture-wicking DotKnit fabric, this slim-fit long-sleeve base layer keeps you warm and dry, while the thumb holes ensure your sleeves stay in place, no matter how many layers you pile on top.