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Heatgen™ Medium Short Sleeve Thermal Top

Product code: T329220

About this style

This super-soft thermal top is made with Heatgen Plus™ technology for extra warmth without bulk. The round neck and short sleeves create a comfortable base layer, while the brushed interior fabric adds cosiness. Made from material with added stretch for flexibility, this medium warmth top is ideal for chillier days. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

Heatgen™ Medium Short Sleeve Thermal Top

€18

Colour

Out of stock online

Size

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Matching items: Thermal Brushed Leggings
Free standard delivery over €75, otherwise €4.50

Reviews (224)

4.7

79% Recommended this product

Mentions
14 November 2026Di36

Snug

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

So warm and comfortable. Delighted with my purchase. Would recommend to anyone seeking a little extra warmth and comfort in the winter blasts!

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

10 November 2026Nan2Holly

Love these thermal tops

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

So glad M&S are making these super thermal tops with short sleeves too. They’re super toasty, wash great and feel comfy on. Sometimes you don’t want long sleeves but want something cosy.. this fits the bill.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

09 November 2026EI13

Could be better in terms of fit at neck and feelin

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

This short sleeved thermal top is fairly warm but does not have the cosy feel of the short sleeved vests. Quite high at the neck so quite obvious when wearing with other tops.

Helpful?

06 November 2026sunburst123

My Go To Winter Vests

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Absolutely love these thermal vests. Really keep me warm during the winter months. Good quality and wash well. Have been buying them for several years now and have quite a stash ! I'm a size 12 but buy a 14 as they are a pretty snug fit.

Reviewer Ratings

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit small

05 November 2026London1234567

Warm but tiny!

Originally posted on marksandspencer.com (UK)

Great top, very warm but there is an issue with the sizing. I am a small in M&S tops (I am a size 10) and the small on this was TINY. I re-ordered a medium and it does fit but is skin tight so if you don’t want that look be aware and go a size up, or two!

Helpful?

01 November 2026GranE2018

My autumn go to.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Perfect under sweatshirts when th weather is starting to turn that bit chilly. I wasn't sure how it would measure up against its long sleeve competition, but its the perfect first step on a chilly morning.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

30 September 2026SamRos

Very convenient short sleeved thermal

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This garment is so useful if I need a bit of extra warmth but do not want my arms covered. It is very comfortable to wear and sits nicely under blouses and jumpers.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

20 September 2026acar

High neck

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This is a lovely warm short sleeved thermal vest. Very comfortable and nice and long which also keeps your lower back warm. 0nly negative was the neck was rather high - which could be seen when wearing a crew neck jumper - and certainly no good to wear under a v neck top. The same material with short sleeves and a scoop neck would be ideal.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

15 September 2026Mallory99

Disappointed

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Disappointed with the quality, very thin almost transparent, returned.

Helpful?

12 September 2026Andra

Love Heatgen

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

i have several Heatgen tops which I wear underneath shirts or jumpers in the Autumn/Winter/Spring. This is a welcome addition to the collection as I was hoping there would be a crew neck.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

15 May 2026Ellen84

Vest

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and warm great fit for winter always buy these

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

13 May 2026Allana17

Warm and snug

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I purchased this hoping it would a normal thermal vest in a short sleeve design, but it is a thicker thermal vest. I’ve decided to keep it and see how I can make use of it. Fits well and it does keep one warm and snug.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

09 May 2026Cesira

Super soft and cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love this product. I bought 2 short sleeve and 2 long sleeve . Very comfy.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

06 May 2026Diamondgirl247

Great Quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Excellent quality and always wash great and keep there shape.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

25 April 2026Moonlight12

Crew neck too high

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Crew neck much higher than winter version. Looks dreadful with open blouses. Keps torso warm but ill considered design for the spring.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

11 April 2026romeanna

I love it!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

It's so warm and cosy - I love it! I'm going to buy another one. The only thing is, the neck is rather high. That's OK if you're wearing it under a top or a jumper with a high neck. But it doesn't work with a lower-cut top or a blouse that isn't buttoned up all the way to the neck.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

04 April 2026Vans L

Good layer

Yes, I recommend this

Bought for teenage daughter for ski layer and she loved it. She didn’t feel sweaty in it and kept her warm perfectly

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

02 April 2026Pat2026

Great quality.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought the wrong size. Manageable all the the same. Thanks

Helpful?

31 March 2026Jenny Angel

Feels good when wearing on colder days.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very cosy and suitable for colder days. Fits well and fabric is good quality.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

29 March 2026Shan

VERY SOFT, VERY WARM, VERY COMFORTABLE

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I am a size 10 and 4’10” tall. I bought two of these in size 18 & size 22. I must mention that I have also bought five T-shirts from M&S in size 18 in 2024 to wear during my holidays abroad, and made a comment as I was so happy. I am a senior citizen and don’t like clothes that cling to my body, as I PREFER COMFORT TO FASHION. So I wear size 18 Thermal Short Sleeve Top for my EXERCISE CLASSES for senior citizens. And I wear size 22 as a PETTICOAT at home under my long dress. They are VERY SOFT, VERY WARM, VERY COMFORTABLE, and made of high quality long lasting material. I have been looking for something like this in many websites for some time, and finally I found it on M&S. I am so grateful to M&S for providing me my exact requirement. Thank you so much.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

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