Base 4.0 Crew - Men's
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Quantity
Base 4.0 Crew
Details
- Heavyweight baselayer top designed for the coldest winter pursuits
- Soft grid fabric traps air against the skin to keep you warm
- Wicks moisture and dries quickly to keep sweat from freezing
- Four-way stretch construction moves with you during cold ski days
- Anti-odor technology keeps you smelling fresh on multi-day trips
- Item #UND02S3
- Material
- 78% polyester, 22% elasterell
- Insulation Weight
- heavyweight
- Fit
- fitted
- Style
- crew
- Anti-Odor
- UA Scent Control
- Recommended Use
- skiing, snowboarding, hiking, snowshoeing, mountaineering, winter camping
- Manufacturer Warranty
- limited lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 104 ratings
Review Summary
Customer Images
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Selecting an option will reload the available reviews on the pageFebruary 6, 2025
Works great keeps me warm during the cold days.
Originally reviewed on Under Armour
February 5, 2025
Great Base.
Fits like a glove, great material, true sizing.
Originally reviewed on Under Armour
February 3, 2025
Great product
Keep me warm while doing ice rescue training
Originally reviewed on Under Armour
January 28, 2025
4.0 Coldgear is 5 Stars
South Carolina experienced extreme cold weather this winter, but while wearing my 4.0 crewneck, the cold weather did not phase me not one bit. I see why the athletes opt for this gear during cold weather games.
Originally reviewed on Under Armour
January 24, 2025
Baselayer 4.0
Absolutely amazing - wore on single digit weather and only my hands and feet were cold
Originally reviewed on Under Armour
January 7, 2025
Great Product
I bought these for my boyfriend who is an avid hunter and Lineman, he loves them! They keep him warm without getting sweaty!
Originally reviewed on Under Armour
January 3, 2025
Great replacement for a coat
I don’t like wearing a coat in Wisconsin. I wanted a solution that provided warmth while still fitting my aesthetic. This base layer 4.0 has been perfect for me. It’s fitted, not bulky and makes a huge difference in keeping my chest and arms warm with just a long sleeve on top of it. I recommend!
Originally reviewed on Under Armour
December 31, 2024
Warm, Comfortable, and Reliable
This base layer is a game changer for cold weather. It is incredibly warm without being bulky it fits perfectly and wicks moisture like a pro. Ideal for any winter activity highly recommend!
Originally reviewed on Under Armour
December 30, 2024
Well made
Purchased for tactical operations. Well made product with great heat retention. Used during cold weather operations and these extended the operational time of individuals, making relief operations an easier task. May be too warm in an active environment.
Originally reviewed on Under Armour
December 23, 2024
Very warm
The fit was great and the warmth is what I have come to expect with UA cold gear
Originally reviewed on Under Armour
Do you have a question about this product?
October 9, 2022
I had the ua metal is the 4.0 the new version of that cause the metal was amazing at extremely cold temperatures like sub 0 Temps and I'm looking for something like that again
March 1, 2022
What's the arm length in small vs. medium?
December 15, 2021
How to care for Base4.)
November 4, 2021
Does any one else get a burning itch when you start sweating
January 10, 2021
I am seeking for base layer for golfing at 25 F. Please recommend best options.
December 13, 2020
What is the arm length on the XL vs the XXL?
March 26, 2020
Hello, How much does the Under Armour Packaged Base 4.0 Crew Shirt weight? Do you have an exact measurement? I am curious about the Small and Medium sizes. Thanks! Asaf
January 4, 2020
I currently own a older base model (about 5 to 6 years old) that does not have the rating on it. and a newer model base layer about two years old what would be the difference between what I have and the new product?
November 16, 2019
I need something for warmth in outside temps of 15 degrees F
October 28, 2019
I looked at the ratings and saw that the long sleeve runs small
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