The base layer long sleeve made specifically for the brutal cold. The men's UA base 4.0 crew was built to battle nature's coldest and most brutal conditions. Its patented mega grip fleece fabric traps heat to keep you seriously warm, without the slightest feeling of being weighed down.
Excess moisture is also wicked away in its unique grid channels, keeping you dry and comfortable no matter how hard you work. And its super stretchy fabrication keeps you ultra mobile, while its anti odor technology keeps you smelling fresh. There's not much this performance crew can't do.