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2pk Heatgen™ Thermal Long Sleeve Tops

Product code: T329101

About this style

Beat the chill with these Heatgen™ thermal shirt tops. Made with our innovative heat-retaining fabric that feels gloriously soft against your skin, they feature a scoop neckline and long sleeves. The added stretch ensures a snug, flexible fit that's perfect for layering as a baselayer, while the light warmth rating provides just the right level of cosiness. Comes in a convenient pack of two. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

2pk Heatgen™ Thermal Long Sleeve Tops

€33

Colour

Size

Matching items: Thermal Leggings
Free standard delivery over €75

Reviews (2424)

4.5

68% Recommended this product

Mentions
28 April 2026madmaj

SO NOT THERMAL

Originally posted on marksandspencer.com (UK)

SO THIN no heat SHOULDN'T BE LISTED WITH THERMAL WEAR

Helpful?

24 April 2026GeorginaMarie

The best - a flexible wardrobe staple

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These tops are the BEST. Very lightweight, but also a really effective layer of warmth. They are great on their own, but brilliant under anything else close-fitting or lightweight that you want some extra warmth under without being seen, as they are close fitting. They make great winter PJ tops too :-)

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 April 2026Suzannejp

Great buy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great purchase and good value for money. Vests are a great thermal lining. Are comfortable and have a soft feel and are true to size. I wear on the motorbike and they are great for layering and keeping you warm and at the right temperature . A really good buy.

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

18 April 2026shasea7

Warm but too snug

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I needed a bigger size but will keep for colder times as is a but too warm for spring

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

17 April 2026WazNo6

Don’t be fooled by how thin this is

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These t shirts are perfect for layering. Not bulky, yet lovely and warm

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

16 April 2026Silverbandh

Game Changer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

have bought 4 of these now, are great, the scoop neck means they can't be seen under clothes and they really do add a good but thin layer of warmth

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 April 2026Hml25

Great value, comfy and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I bought these as the old black sparkly ones I had are finally wearing out. These are really comfortable, surprisingly warm considering they are quite thin material (also good as they are not bulky) and great value. However they come up quite small - I go up at least one size

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

12 April 2026Anonymous together

Fir Comfort and quality choose M&S

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Have had these for several years now and always find they fit well are comfortable and act as a good base layer. The quality is very good

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 2026Janiejinx

Nice Top

Originally posted on marksandspencer.com (UK)

Love the heatgen line of clothes but I sent these back as they weren’t as thick as I was expecting. The neckline was important to me but they didn’t appear to have the tops I had last year

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04 April 2026Gouldy64

Great top for extra layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great tops last for ages neck line is great and nice and thin to go under clothing

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 2026Nonna26

Great quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I am always pleased with my purchases from Marks. The staff are forever helpful and friendly.

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

31 March 2026bonniegirl

Only 4 stars as the sleeves are really long

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Bought the thermal tops to wear under tops in the cold weather. I’m 5’3” and the sleeves come to my fingertips! Other than that tops are good.

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 2026Shalders

Two thumbs up.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great. My young person recommends for a base layer. Pick up Delivery was quick and easy. Thanks guys

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

28 March 2026Julia 123

Thermals excellent buy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These thinner thermals are great for wearing under thinner tops. I've bought them in black and white. Soft fabric. Wash beautifully.

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

19 March 2026Digill

Excellent quality .

Originally posted on marksandspencer.com (UK)

Great good layering piece washes wrll . Good under blouses not too thick

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

19 March 2026Nickyg73

Lovely for layering

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These light thermal tops are great for layering with a dress or under a jumper.

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

18 March 2026Pam2Ao

Poor quality control

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

The reason I gave only one star is due to the total lack of care or quality control in the packaging. There was only one top in a 2 pack item; the one I did receive was scrunched up and had been stuffed into the packaging which was torn. Although the top itself is good, I would think twice about ordering anything from M&S online again, especially as I have noticed other reviewers saying something similar about the packing having ordered other clothing items.

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

18 March 2026Seahorse23

Great for Winter to Spring time

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love these thinner thermal tops. Just right for the temperature changes in Spring and Autumn. I have the light blue ones and look great under a cardigan too.

Helpful?

16 March 2026JLO20

I love M&S

Originally posted on marksandspencer.com (UK)

I love these tops and wear them all through the winter under jumpers or cardigans. I have them in all dufferent colours and wouldn't be without them

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 March 2026Shah123

Good basics to have

Originally posted on marksandspencer.com (UK)

Great thermal. Thin but works well. Only thing I would say it’s very long

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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