UA Base™ 4.0 is built for extreme cold weather and lower activity. Their unique pattern traps heat without adding bulk. Think long underwear, revamped for today
UA Base 4.0 is built for extreme cold weather and lower activity. It uses a unique pattern that's designed to trap heat without adding bulk. Think
Men's UA Base 4.0 ¼ Zip
Under Armour Latex Bottoms for Boys Sizes (4+)
Boys Base Layer Bottoms
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The first layer to put on when the mercury dips. These comfortable boys' cold-weather leggings are the weight of a T-shirt but wick away sweat to keep
Boys' ColdGear® Armour Leggings
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