You just checked the forecast on your phone and things don't look good. In fact, they look pretty terrible: teeth chattering, bone chilling cold. But you have nothing to worry about, because you've got the Under Armour Base 4.0 Crew Top. Built from polyester and elastane, and 4 way Stretch that allows for superb mobility, this top is the kind of layer you want when things are brutal outside. It features a soft, brushed negative grid interior that keeps hot air close to you, giving you unmatched warmth. Sweat is wicked away from your body, and anti odor technology keeps bad smells at bay. The weather outside can be frightful, but the Under Armour Base 4.0 Crew Top is delightful.