Men's ColdGear® Base 4.0 Leggings

Style # 1343245
Height: Size: Fit: Fitted
Mens ColdGear® Base 4.0 Leggings
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Size and Fit Guide
Due to limited quantities, only 100 allowed per customer.
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Height: Size: Fit: Fitted
Men's ColdGear® Base 4.0 Leggings

Product DNA

UA Base 4.0 men's cold weather leggings are built for extreme cold weather and lower activity. Their unique pattern traps heat without adding bulk. Think long underwear, revamped for today's top athletes.
  • Fitted: Next-to-skin without the squeeze
  • UA Base™ 4.0 Extreme Baselayer is our warmest yet, delivering extreme warmth in the extreme cold
  • UA Scent Control Technology to keep you undetected in all pursuits
  • Soft, brushed grid interior traps air, managing your body's microclimate to keep you warm & comfortable
  • Material wicks sweat & dries really fast
  • 4-way stretch material moves better in every direction
  • Performance elastic waistband
  • Style #: 1343245
  • Working fly
  • Inseam: 30.5"
  • 81% Polyester/19% Elastarell
  • Imported
  • Machine wash cold with like colors
  • Use only non-chlorine bleach when needed
  • Tumble dry low
  • Do not iron
  • Do not use softeners
  • Do not dry clean

Review Summary

26 Reviews


Runs small Runs large


Min. Max.


Min. Max.

shut the cold out

a great product at a great price and an awesome delivery time frame.

Outstanding warmth

[This review was collected as part of a promotion.] Base layer kept me warm all day on mountain winter hikes in the snow. Highly recommended

Warm use for winter biking camping

[This review was collected as part of a promotion.] Stretchy flexible warm. Going to bike in the snow in it, with a sport rain jacket over it as wind breaker should be fine.

Under Armour

This product is great!! They are warm and comfortable to wear.

This product was great

I've had your previous 4.0 and I have to say they by far are better than this one. This one lacks the warmth I was looking for.


I work outside everyday for sometimes up to 14 hrs, and have used your products for a few years now. When it came time to get some new pairs I ordered 4 of the 4.0 cold gear extreme baselayer. I was surprised when I found myself getting cold while at work. I love the older pairs that I have and it would be awesome if you went back to that design as these that you're selling now do not work as good. Very disappointed with them and will be moving on and trying to find a different brand that will actually keep a working guy warm

Bad idea

As others have said, these are no where near as good as the original pillow fleece version. What the heck are you people thinking. If it's not broken, don't fix it

Absolutely incredible

I bought these about 6 years ago.. SIX YEARS AGO. And I still use them today. I think the model/style has changed since then. But holy wow these rock. I originally bought them to wear in ND when I was working on Oil Rigs doing system testing. During the winter when the wind is blowing hard, temps reach -50 or worse at time. I use to wear these and then just a pair of work pants over them and I was fine. (the work pants were slightly insulated too) But compared to my fellow workers who had many many layers on, I had just 2. I love these. Im actually wearing them now and about to go hiking up the Manitou Incline in CO. Its about 15 degrees out. Im just wearing these and a pair of shorts over them.

Cold gear long underwear

My husband is a soccer coach and always cold he love these

Quality material. Not as warm as they use to be

I have an older pair of the 4.0. Like others have mentioned, it’s made of a different material/construction that is very different from its previous construction. Definitely not worth the 80.00