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2pk Heatgen™ Medium Thermal Long Sleeve Tops

Product code: T329226S

About this style

The two thermal tops in this pack are designed to keep you warm without adding bulk. Made with Heatgen™ technology, the fabric is lightweight and supersoft with added stretch, making it ideal as a cosy base on chilly days. The crew neck and long sleeves deliver a classic silhouette that's easy to layer. M&S Collection: versatile styles in modern shapes with unique and playful details.

M&S

2pk Heatgen™ Medium Thermal Long Sleeve Tops

€42

Colour

Size

Free standard delivery over €75, otherwise €4.50

Reviews (12)

4.3

75% Recommended this product

Mentions
15 September 2026rightfit

Cosy and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These tops are high quality. Soft and light yet warm. Just what I needed.

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 September 2026LolaRose247

Soft and comfy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very soft inside and comfortable. Not sure how warm they will be in the colder months but easy to layer up.

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 August 2026Lavenderuno

This is a thermal undies “just buy me” - superb!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These are amazing. The look like an expensive quality t shirt, they wash and stay looking new and they fit perfectly because of the sizing available. You will need several in light, medium and warmest levels. I suggest you only need one crewneck on at one time, with up to one base (light layer) and top (warmest fleece) layer. EVERYONE IN UK NEEDS THESE IN WINTER. Without doubt this Heatgen range is the best thermal underwear I have ever used in 20+ years. Thank you M&S for finding it!!!

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

26 May 2026TRnorfolk

Soft and Warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely soft fabric and fits true to size. Keeping me very warm even in Iceland. Like all M&S clothes little pricey.

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

08 March 2026MChloe

Poor quality bubbling issue

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Bubbling extremely poor quality I wouldn’t expect them to bubble on the first day of where not impressed. Don’t buy waste of money.

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

02 March 2026JoJ100

Excellent Thermal Tops

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Always purchase M&S thermal tops as excellent quality, lovely and soft and wash well. These are not quite a thick as the warmest ones, as expected, and they are great as the temperature starts to lift a little. I have the warmest tops, these medium ones and the thinest ones for year round seasons. These are a nice slim fit but I prefer them close to body for warmth, but if you like a bit more space in a top you may want to size up. These last for years so might be more expensive than other brands but don't lose warmth on repeat washing so are excellent value.

Helpful?

24 February 2026Mel A 1

Sleek and smooth as a layer and cosy!!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Delighted with this double pack! Good value. These soft snug thermal tops are so wearable and useful. Black is a staple in my wardrobe.

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

02 February 2026TriciaN14

Warm and luxurious

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These are the best thermals I've ever bought, and yet not the most expensive. For a small saving I bought a double pack of the black tops, as black is the most versatile colour for thermals under my winter clothing. The tops are true to size and fit perfectly. The brushed lining is so comfortable and warm, and the outside is silky and glides under clothes without seeming bulky.

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 December 2025westendshopper

God but sizing poor

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Black in this is lovely & cosy needed to size up as comes up small tried same top in grey fit even smaller so returned

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

16 November 2025Dory27

Wonderful

Originally posted on marksandspencer.com (UK)

Lovely feel to these tops being soft , warm, comfortable and stretchy . Fit fantastic as they strech in the right places. They wash really well and maintain shape , size and softness . No shrinkage . The arms and body lengths are generous and dont scrimp like other similar tops that leave your back bare on bending and your wrists/ forearms not covered. Great value for money. Will buy more .

Reviewer Ratings

How do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

08 November 2025Alison2468

Quality product

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I am very pleased with this pack of two long sleeved tops. The fabric is thick, soft 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

26 October 2025Farmer Lucy

Does the job but...

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

The tops have an infuriating habit of rolling up as I move. Other people have said the same. They're ok if tucked in but not as good as some brands.

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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