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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.

Details & care

Care instructions

Machine washable

Features

Heatgen™ technology

lightweight and supersoft, designed to keep you warm when the weather gets chilly

Composition

66% acrylic, 28% viscose and 6% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

Do not dry clean

M&S

2pk Heatgen™ Thermal Long Sleeve Tops

£25

Colour

Customers say:

Fits true to size()
Size

Matching items: Thermal Leggings
Free standard delivery over £60

Reviews (2435)

4.5

68% Recommended this product

Mentions
28 April 2026madmaj
Verified Purchase

SO NOT THERMAL

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

Helpful?

24 April 2026GeorginaMarie
Verified Purchase

The best - a flexible wardrobe staple

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 April 2026Suzannejp
Verified Purchase

Great buy

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 April 2026shasea7
Verified Purchase

Warm but too snug

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 did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

17 April 2026WazNo6
Verified Purchase

Don’t be fooled by how thin this is

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 April 2026Silverbandh
Verified Purchase

Game Changer

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 April 2026Hml25
Verified Purchase

Great value, comfy and warm

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 did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

12 April 2026Anonymous together
Verified Purchase

Fir Comfort and quality choose M&S

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 April 2026Janiejinx
Verified Purchase

Nice Top

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

Helpful?

04 April 2026Gouldy64
Verified Purchase

Great top for extra layer

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 April 2026Nonna26
Verified Purchase

Great quality

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 March 2026bonniegirl
Verified Purchase

Only 4 stars as the sleeves are really long

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

29 March 2026Shalders
Verified Purchase

Two thumbs up.

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 March 2026Julia 123
Verified Purchase

Thermals excellent buy

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

19 March 2026Digill
Verified Purchase

Excellent quality .

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

19 March 2026Nickyg73
Verified Purchase

Lovely for layering

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 March 2026Pam2Ao
Verified Purchase

Poor quality control

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 March 2026Seahorse23
Verified Purchase

Great for Winter to Spring time

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
Verified Purchase

I love M&S

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 March 2026Shah123
Verified Purchase

Good basics to have

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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