The Best Winter Running Gear

Under Armour Women's ColdGear Authentics Mock Neck, Midnight Navy ($47, originally $55)

This long sleeve mock neck from Under Armour is a warm base layer that'll last you years — perfect for layering under a jacket or wearing on its own. Shoppers say it's soft, comfortable, and extremely insulating. "Living in North Dakota, staying warm is invaluable," one reviewer wrote. "UnderArmour Cold Gear is the only base layer [that] provides warmth, KEEPS warmth, and protects from the unforgiving wind."