Men's ColdGear® Base 4.0 ¼ Zip

Style # 1343242
Height: Size: Fit: Fitted
Mens ColdGear® Base 4.0 ¼ Zip
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Height: Size: Fit: Fitted
Men's ColdGear® Base 4.0 ¼ Zip

Product DNA

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 structure to trap heat without adding bulk. Think long underwear, re-engineered for athletes performing at their peak. UA Base 4.0 is built for extreme cold weather and lower activity levels.
  • Fitted: Next-to-skin without the squeeze
  • UA Base™ 4.0 Extreme Baselayer is our warmest yet, locking in your body's heat to deliver extreme warmth in the extreme cold
  • UA Scent Control Technology to keep you undetected in all pursuits
  • Soft, brushed grid interior traps air against your skin, closely managing your body's microclimate to keep you warm & comfortable
  • Material wicks sweat & dries really fast
  • 4-way stretch construction moves better in every direction
  • ¼-zip front allows you to dump excess heat quickly & efficiently
  • 81% Polyester/19% Elasterell
  • Imported

Review Summary

6 Reviews
33% of reviewers recommend


Runs small Runs large


Min. Max.


Min. Max.

Muy cómoda, ideal para los días de frío.

Muy cómoda, ideal para días fríos. Se ajusta perfectamente, transpira muy bien , no notas que la llevas.

Warm and comfortable

True to size. Comfortable to wear all day in the field with a flannel shirt.

it keeps you warm, and dry.

Great fit, and quality. It is warm with a soft feel.

Is for xtreme cold

Great fit. I have a 42in chest and 29in waist . Have this in large and fit great top to bottom. Does have thumb strap. I use them when putting on more layers. I don't have a problem with these. The 4.0 has great hold in place sleeves. They don't move. I had the left sleeve turned under and added a longer thumb strap and sewn. I wear my watch on my left.

Awesome base layer

I use this item under my cold weather hunting clothes. Fits perfect. Wicks sweat away and keeps me toasty warm in the hunting stand or walking and stalking- you will not be disappointed!

Fitted, So Watch the Sizing

This shirt is fitted. I normally wear a 2XL in UA shirts, however, I had to go to a 3XL for this model. For size comparison, I am 6'4", 225#, 40" waist and 37" sleeve length. The 3XL fits perfect. If you're wondering about the garment measurements for comparison, the 3XL has the following: Armpit to Armpit, 25" across. Sleeve length is 37" from back of the neck to the end of the sleeve cuff. Shirt length from top of collar to the bottom hem is 33.5". Zipper length is 7.5". Sleeve width at the elbow is 7.5". If you are muscular, have thick arms or beefy at the chest/abdomen, I highly recommend going to a size larger (unless you like the fitted, tight feel). This will be a great base layer for cold weather and great outer layer when the temps are cool or warmer. It has a fleece like lining and should keep you warm this winter season. This shirt DOES have an inner thumb strap (not thumb holes) at the sleeve ends for easy on. So nice, it comes in a fancy box rather than a plastic bag.