Under Armour
HeatGear Long Sleeve Base Layer Top
£36
£18
Product code: T128209T
About this style
This Under Armour baselayer provides premium performance through lightweight HeatGear® fabric. Cut to a regular fit with a compression feel that provides support during activity. The high mock neck offers additional coverage, while strategically placed stretch-mesh panels increase ventilation. Long sleeves and an ergonomic design ensure durability and a locked-in feel for intense training sessions.
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 (79)
This product is great.
Originally posted on Under Armour
Yes, I recommend this
The product is very stretchy and provides good warmth. Love the material that it is made out of it’s very comfortable.
Helpful?
Great comfort
Originally posted on Under Armour
Yes, I recommend this
The shirt feels great and keeps you cool during a workout. Form fitting gives u a secure feel and tightens up some areas
Helpful?
Never received.
Originally posted on Under Armour
No, I don't recommend this
It's probably a nice shirt but I'll never know. I ordered it 3 months ago and has yet to arrive despite following up with UA.
Helpful?
Replied
19 October 2025
Hi, Alex! We’re really sorry to hear your order hasn’t arrived — that’s definitely not the experience we want for you. We’ll follow up via email shortly to help resolve this.
Compression Shirt
Originally posted on Under Armour
Yes, I recommend this
Love this supportive fit and look. I wish the length was a tad longer but at 6'5" it comes to my waist and rides up a bit.
Helpful?
Perfect Heat Gear
Originally posted on Under Armour
Yes, I recommend this
I purchased a mock heat gear and couldn't be happier that I did. It is a perfect fit and keeps me warm in the winter. I was looking for something that fits and looks good at the same time, but I was not able to find it by other brands. They were either loose fitting or made with poor material. After trying for a while, I purchased two more with different colors.
Helpful?
I expected better
Originally posted on Under Armour
No, I don't recommend this
I have made multiple UA purchase for myself, and others. These shirt came up short. The arms and body feels as if painted, while the neck droop's.
Helpful?
Replied
30 September 2025
Hey, Richard! We're sorry the shirt didn’t meet your expectations. We’ll be reaching out via email shortly to help make this right.
Great product
Originally posted on Under Armour
Yes, I recommend this
Overall, great product. Fits well, it will help with training and keeping the right temperature of the body. Would recommend it to others.
Helpful?
Not really
Originally posted on Under Armour
No, I don't recommend this
Not thick enough for colder weather like previous purchases.
Helpful?
Replied
22 September 2025
Hey, Mike! We're super sorry our gear wasn't what you expected. This particular top is from our HeatGear® line, which is meant to keep you cool in the heat. If you're looking for something to keep you warm in the cold, check out our UA Base™ 3.0 Crew, which offers warmth without the bulk! I'll send an email for more details.
Under armor heat gear
Originally posted on Under Armour
Yes, I recommend this
Excellent fit, looks great , outstanding quality!
Helpful?
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! 🏒💯
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