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 long underwear, revamped for today's top athletes.
Men's UA Base 4.0 Leggings
Under Armour Men's ColdGear® Base 4.0 ¼ Zip SM Black : Clothing, Shoes & Jewelry
Under Armour Men's ColdGear® Base 4.0 ¼ Zip SM Black : Clothing, Shoes & Jewelry
Under Armour Men's ColdGear® Base 4.0 ¼ Zip SM Black : Clothing, Shoes & Jewelry
Under Armour Men's ColdGear Base 4.0 Leggings : : Clothing, Shoes & Accessories
Men's Armour Fleece® ¼ Zip
Women's UA Base 4.0 Crew
Under Armour Men's ColdGear Base 4.0 Leggings : : Clothing, Shoes & Accessories
UA Base is a system of baselayers, numbered from 2.0 – 4.0, that takes you from cold to absolutely freezing temps. It uses a special negative grid
Under Armour Women's Base 4.0 1/Z Zip- Black
Under Armour Men's ColdGear® Base 4.0 ¼ Zip SM Black : Clothing, Shoes & Jewelry
Under Armour ColdGear Base 4.0 Crew