Packaged Base 4.0 1/4-Zip Top - Men's
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Why We Like The Packaged Base 4.0 1/4-Zip Top
When the mercury drops but the mountains are still calling, we're dressing as warm as we can without sacrificing breathability and lightness for our adventures in the most frigid of conditions. Under Armour's Packaged Base 4.0 1/4-Zip Top wicks sweat and dry quickly so we can plan for steep hikes without the risk of overheating. Stretch construction allows total mobility, and a quarter-length front zipper makes it easy to adjust when we warm up. Anti-odor treatment keeps us fresh after multiple days, and a brushed grid fabric traps air against our skin for maximum warmth.
Details
- Heavyweight baselayer for outdoor pursuits in frigid conditions
- Brushed grid fabric traps air against your skin for maximum warmth
- Material wicks sweat and dries quickly as you work up a sweat
- Stretch construction lets you move freely on steep hikes
- Quarter-length front zipper makes it easy to dump heat when needed
- Anti-odor treatment keeps things fresh after multi-day missions
- Item #UND02Q7
- Material
- 81% polyester, 19% elasterell
- Insulation Weight
- heavyweight
- Fit
- slim
- Center Back Length
- [medium] 29in
- Style
- mock-neck
- Anti-Odor
- UA Scent Control
- Claimed Weight
- [medium] 10.5oz
- Manufacturer Warranty
- limited lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 44 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageFebruary 12, 2025
OK but a design flaw
This UA base is pretty thick for a base layer and does provide decent warmth. However, it fails in providing enough warmth in extreme cold especially when wind is involved. The problem with it is the neck and chest is sized disproportionally loose vs (zero compression) the rest of the areas on the body. In other words the loose areas on the neck and chest allows the cold to easily enter your core...I am no stranger to UA base layers I purchased my first 25 years ago the original cold gear which I still have, and recently purchased 3 more of the originals now they are re-offered after all these years...But this UA Base 4.0 fails far short of its intended purpose and price twice as much as the Original Cold gear...Not a fan of this offering.
Originally reviewed on Under Armour
February 3, 2025
High quality, extremely warm.
If you need a high-performance base layer for extreme cold, the UA Base 4.0 ¼ Zip is one of the best options out there. Just bought my second one.
Originally reviewed on Under Armour
January 6, 2025
Great base layer, warm and comfortable
Originally reviewed on Under Armour
December 30, 2024
Nice
Good quality nice and warm
Originally reviewed on Under Armour
December 26, 2024
High quality/warm
amazingly, surprisingly warm.
Originally reviewed on Under Armour
December 22, 2024
My go to for cold weather
I work outside, and this 1/4 zip is my go to when the temp drops. I think I have 5 of them now... one for every day!
Originally reviewed on Under Armour
December 17, 2024
Best UA Base Yet
I've been a long time user of UA Base. This new technology is absolutely the best yet. Haven't gotten into really frigid temps yet but in High 20's and low 30's it was more than adequate.
Originally reviewed on Under Armour
December 13, 2024
Like the overall fit & feel
Purchased a Large. The fit & feel is nice. Only issue is it maybe a little too tight in forearms (if you like to roll-up your sleeves).
Originally reviewed on Under Armour
December 11, 2024
This product fit me perfectly!
I knew to order this product in a size Large because of their detailed description of the size and the height of the model in the photos, and it fit me perfectly! I wear this along with my black ColdGear Base Layer shirt underneath and the two products compliment each other perfectly. This performance of this 1/4 Zip was exactly what I needed for the cold weather we are experiencing in Canada. Highly recommend!
Originally reviewed on Under Armour
December 11, 2024
Great base layer.
Very breathable and great fit. Was hoping it would be a little bit warmer for extreme cold, however not disappointed with the purchase.
Originally reviewed on Under Armour
Do you have a question about this product?
December 29, 2021
I'm looking for a base layer for snowboarding. Is there a downside of buying the 4.0 rather than 3.0? Will 4.0 be too hot? Or is it that it doesn't allow for as much movement? Just looking for some guidance. Thanks.
November 18, 2021
what about 10-15 degree weather
March 2, 2021
Would you be able to swing a golf club in this
November 12, 2020
Does it shrink after being washed and dried? I’ve read that this runs a bit small and concerned it would be to tight afterwards.
October 3, 2020
Does it come with the leggings too or no
October 3, 2020
I don’t understand if this is like a base layer sweater or if you wear this over the long sleeve compression shirt. Will it be enough between 35-55 degree weather?
October 29, 2019
Does the 1/4 zip have a flap at the top of the neck covering the zipper as to not aggravate the neck?
October 2, 2019
Hi. Is it suitable for running outdoors in sub zero temp?
September 10, 2019
Hi, I’m not sure if this is a thing or not in men’s extreme base layers. I know the women’s 4.0 base layer has thumb holes in the end of the sleeves, because I bought that base layer for my wife, years back! While deer hunting and ice fishing, I’ve worn her 4.0 and I love it for the warmth and comfort! The thumb holes help from my sleeves riding up and the extra length it provides, helps keep my hands warm longer. I’ve been looking for men’s 4.0 with thumb holes in the sleeve also but to no avail. Why is that? Do I have to keep wearing my wife’s Under Armour long underwear?
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Under Armour men's baselayer for cold weatherHeavyweight 1/4 zip top for outdoor adventuresBrushed grid fabric for optimal warmthQuick-drying material for active pursuitsStretch construction for unrestricted movementAnti-odor treatment for multi-day wearSlim fit design for a modern lookIdeal for hiking and climbing in winterLightweight yet warm baselayer for menDurable synthetic fabric for rugged conditionsQuarter-length zipper for adjustable ventilationPerfect for all-mountain skiing and snowboardingLearn more about Packaged Base 4.0 1/4-Zip Top - Men's