Update your browser for a better shopping experience!

Get faster load times, stronger security and access to all features.

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

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

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

Delivery, collection & returns

Delivery

Standard

UK Standard Delivery is available for £3.99 or free on orders over £60 (excluding furniture).

Nominated Day

UK Next Day Delivery and UK Nominated Day Delivery (excluding Northern Ireland) are available for £5.99 (excluding furniture)

Collection

Collect from store

Store collection is free on all fashion, home and beauty orders.

Returns

UK returns

Free

Exclusions apply

Full delivery and collection informationOur returns policy

Reviews (2330)

4.5

68% Recommended this product

Mentions
05 February 2026Daiy
Verified Purchase

Great Buy

Yes, I recommend this

These tops are so warm and comfortable and wash easily. They look great under jumpers or tops for a base layer of warmth and style. I would definitely recommend them.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 February 2026
Verified Purchase

Wonderfully warm

Yes, I recommend this

Lovely and warm. I now have at least 6 of these thermal tops. They are very effective at keeping you warm. Thay fit very comfortably and come in black grey or beige.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026EllieD3
Verified Purchase

Love these

Yes, I recommend this

Perfect fit and very warm and comfortable, the low neck line makes them perfect for wearing under jumpers or hoodies

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026JoBal3
Verified Purchase

Great - except for the size!!

Yes, I recommend this

Very warm & comfortable & excellent value BUT bought size 16 & had to give them to a skinny friend & buy size 20!

Helpful?

04 February 2026Alison175
Verified Purchase

Excellent

Yes, I recommend this

These tops are great for keeping warm in winter, I have bought them before and would buy them again

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 February 2026DoryB
Verified Purchase

Great thermal tops.

These tops are great ,warm comfortable good quality and fit.

Helpful?

02 February 2026Carolyn40
Verified Purchase

Not very warm

No, I don't recommend this

Bought these because I really feel the cold. They provide another layer but I wouldn’t say they are thermal, and they don’t really deliver extra heat. The fabric is stretchy but they fit extremely tightly so if you don’t like the feel of a very snug fit you might order the next size up.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

02 February 2026AnnieAnne25
Verified Purchase

Lovely and warm

Yes, I recommend this

A really warm and soft base layer would definitely buy again

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 February 2026Tara03
Verified Purchase

Too thin and clingy

No, I don't recommend this

Please bring back the medium warmth scoop neck tops. My go-to tops were the medium thermal scoop next tops but they seem to have discontinued, so I gave these a chance and they were extremely thin and clingy (size 6), so they didn’t provide the same level of comfort compared to previous versions.

Reviewer Ratings

How did it fit?

Very small

Helpful?

Reviewer Ratings

How did it fit?

Very small

02 February 2026KittyKat778899
Verified Purchase

Perfect underlayer for cold weather.

Yes, I recommend this

Great as an underlayer - look very thin at first but kept me warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 February 2026ferns
Verified Purchase

disappointed

I was bitterly disappointed with this product.It is nowhere near the quality of the ones I purchased previously.the material is like nylon.not soft & comfortable like the ones i got before.I am unable to wear these a the material around the neck irritates my neck,Had I been able to get to a store I would never have bought them.This is the worst product I have ever bought from M&S.

Helpful?

02 February 2026Nicky25
Verified Purchase

Fantastic! Really keep you warm!

Yes, I recommend this

I have many of these tops. They really do help to keep you warm. I get lots of wear out of them as I’m cold for at least 6 months of the year!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 February 2026B Alsford
Verified Purchase

Versatile

Yes, I recommend this

I wear this either under a normal top or under the maximum heatgen top and adapt these combinations depending on the temperature for Spring, Autumn and Winter

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 February 2026Annieas
Verified Purchase

Excellent quality

Yes, I recommend this

Great product, easy to wear very warm and unobtrusive.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 February 2026Geoffeey275
Verified Purchase

Brilliant Item

Yes, I recommend this

Excellent undergarment, although is very passable as a tee shirt worn under something else. The fabric is really fine, I can’t understand how it is so warm; is unobtrusive under other tops. I bought in black but have now also ordered the cream version.’

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 January 2026Franki48
Verified Purchase

Fantastic thermal vests

Yes, I recommend this

Love these thermal vests. The fabric is so soft and gentle. The vest keeps me really warm and are the

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 January 2026Gwenjy
Verified Purchase

Good product

Warm but sleeves really tight. Very creased after washing even at 30°.

Helpful?

31 January 202699buttons
Verified Purchase

Ideal for layering

Yes, I recommend this

This is a repeat purchase of these as I have several in different colours. They are soft, comfortable and light enough for layering - I wear them under T shirts during colder weather and know that I will be warm all day but not overheated.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 January 2026Lauriston45
Verified Purchase

2pk Heatgen™ Thermal Long Sleeve Tops

Yes, I recommend this

Absolutely perfect under dresses for extra warmth.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 January 2026PontAven
Verified Purchase

Cosy tops

Yes, I recommend this

Bought pack two as cheeper% needed them even in January as the floor & air is cool in the hall.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

1 of 389