Style # 1220574

Product Info User Reviews

An unbelievably warm longsleeve baselayer built to take on unthinkable cold.

WHAT'S IT DO? The Men’s UA Base® 4.0 Crew was built to battle nature’s coldest and most brutal conditions. Its patented mega-grid fleece fabric traps heat to keep you ridiculously warm without feeling weighed down. It wicks away excess moisture in its unique grid channels—keeping you dry and comfortable no matter how hard you work. You can also move with unrestricted ease thanks to UA's super-stretchy fabrication. Facing insane temperatures? Get the performance crew that makes more sense—and delivers more warmth—than anything else out there.

Watch the Product Features Video
  • UA Base®: 4.0 delivers heat like no other, keeping you warm even in the brutal cold
  • Signature grid channels trap heat while providing extreme moisture transport—keeping you dry and light in the coldest conditions
  • 4-way stretch construction improves range of motion and dries faster
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Features

ANTI-PICK/ANTI-PILL

Durable anti-pick/anti-pill finish helps prevent pulls and snags for a cleaner, smoother appearance no matter how hard you work.

ARMOURBLOCK®

ArmourBlock® stops odor-causing microbes from spreading for maximum scent suppression.

UA BASE™

Not your ordinary long underwear, our UA Base™ collections feature a brushed thermal grid pattern that traps heat so you can battle even the most brutal cold.

Technology

ColdGear®

HOW DOES IT WORK?

Even in the bitter cold, our gear works overtime to regulate your core temperature—keeping you outside longer. Sound crazy? Click the video to see how it works.

View our temperature guide
THIS GEAR'S FIT IS:

Fitted

HOW DOES IT FIT?

Sits close to the skin for a streamlined fit without the squeeze of compression. Check out the video breakdown now.

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Fit Guide
 
THIS GEAR’S BUILT FOR:

MTN

Men's Under Armour MTN Gear