Under Armour
HeatGear Long Sleeve Base Layer Top
£36
£21.60
Product code: T128209T
About this style
This Under Armour training top is your ultimate performance base layer. The compression fit, delivered through tough, lightweight HeatGear® fabric, provides a supportive, locked-in feel. Strategically placed stretch-mesh panels provide ventilation where you need it most, while the updated ergonomic design enhances durability. A high mock neck offers additional coverage, and the material wicks moisture to keep you dry.
Details & care
Details & care
Fit and style
•
Regular fit
Composition
84% polyester, 16% elastane
Care
Machine wash according to instructions on care label
Delivery, collection & returns
Delivery, collection & returns
Delivery
Standard
Free over £60, or £3.99
Returns
UK returns
Free. Returns can only be arranged via postal options. Exclusions apply Full delivery and collection information Our returns policy
Exclusions apply
Full delivery and collection informationOur returns policyAbout Under Armour
About Under Armour
Train at your best, no matter the weather, with Under Armour's innovative clothing, footwear and accessory designs.
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Reviews (70)
Love them
Originally posted on Under Armour
Yes, I recommend this
My boys like these a lot to wear under their football pads.
Helpful?
More colors
Originally posted on Under Armour
Yes, I recommend this
It will be great to have this in royal blue color options.
Helpful?
Replied
01 September 2025
Hi Estuardo! Thanks so much for the review and the suggestion! A royal blue option would definitely be a great addition. We love hearing what our customers want to see. We hope to see you rock some royal blue gear soon!
Runs V Small
Originally posted on Under Armour
Yes, I recommend this
Nice material but runs at least one size small. Can’t even put it on.
Helpful?
Replied
19 August 2025
Hey there! We're sorry the sizing didn't work out, but hang tight, we’ll be reaching out shortly to make this right. 💪
Great
Originally posted on Under Armour
Yes, I recommend this
So good - smooth and shiny
Helpful?
Great Workout Gear!
Originally posted on Under Armour
Yes, I recommend this
These shirts are awesome! They fit extremely well. No obstruction from my workout whatsoever. Definitely will be buying more in different colors
Helpful?
Great in hot weather
Originally posted on Under Armour
Yes, I recommend this
Game changer …keeps you cool
Helpful?
good for heat
Originally posted on Under Armour
Yes, I recommend this
A good long sleeve to keep cool during the heat. Durable and well made. Bought for a friend and he rly liked it. Uses it for drumming too
Helpful?
Amazing
Originally posted on Under Armour
Yes, I recommend this
Such a great buy with amazing quality and super comfortable!
Helpful?
Great for a Cool Spring Day
Originally posted on Under Armour
Overall I like this Heat Gear Base Layer : At 6 Feet - 225 I normally wear XL, this XL is a little on the smaller side but not too bad. I have purchase many UA items in the past, from Base layers to Jackets and I have been happy with most of them.
Helpful?
Light and Tough
Originally posted on Under Armour
Yes, I recommend this
The heatGear is great warm weather compression and indoor training. Can wear inside and outside.
Helpful?
Great Hockey Base Layer Shirt
Originally posted on Under Armour
Yes, I recommend this
I am 6’6” with a seven-foot wingspan, and this shirt in size large-tall fits very well as a base layer under hockey pads. The torso is long enough that it stays in place through practices and games, and the sleeves are actually the proper length for my arms, leaving no exposed skin above my gloves.
Helpful?
Replied
30 March 2025
Thanks for the awesome review! 🙌 We love hearing that our shirt is a perfect fit for your game! 🙌 Sounds like it’s doing exactly what it’s supposed to—no gaps, no slip-ups. Keep dominating on the ice, and we’ve got your back for all your gear needs! 🏒💯
Great Light Weight Mock
Originally posted on Under Armour
Yes, I recommend this
This mock is a great light weight shift to wear under your uniform. If you are looking for something warm, then I suggest that you go with the Cold Gear one.
Helpful?
Quality Item
Originally posted on Under Armour
Yes, I recommend this
Just what we were looking for! Perfect for my son for the early baseball season. Great price with our teacher discount too!
Helpful?
1st Time Buyer
Originally posted on Under Armour
Yes, I recommend this
Under Armour comes highly recommended by friends and co-workers.
Helpful?
Great feel! Great fit!
Originally posted on Under Armour
Yes, I recommend this
Very comfortable mock base layer for coaching.Fits great and free range of movement. Great for playing and coaching.
Helpful?
Product fits very well, great to have around
Originally posted on Under Armour
Yes, I recommend this
The products I ordered fit great, great to have around them i wear them almost everyday haha. The black long-sleeved shirts keeps me so warm, almost warmer then my winter coat!
Helpful?
Length is great just a tad tight
Originally posted on Under Armour
Yes, I recommend this
The material is excellent for keeping cool and the length is decent for my tall slim build. It is a tad tight though and I wish the shirt was a bit looser. I tried the XL tall which is too loose.
Helpful?
Great shirt
Originally posted on Under Armour
Yes, I recommend this
These shirts are very comfortable to wear. The only thing about them is the sleeves are a little longer than I like, but that isn’t stopping me from buying more.
Helpful?
Lightweight and warm
Originally posted on Under Armour
Yes, I recommend this
Not quite as warm as my cold gear but it does do a great job in the right weather situation for me. Top quality that looks like it will really last.
Helpful?
This product is great!
Originally posted on Under Armour
Yes, I recommend this
This long sleeve is great. I would recommend to anyone. I bought this product to wear under my golf polo in the winter time
Helpful?
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