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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 (2406)

4.5

68% Recommended this product

Mentions
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

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True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

14 March 2026MagentaAli

Warm and comfortable

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I've bought lots of these long sleeved heatgen tops over recent years. I wear one every day during the colder months and they really do make me feel much warmer even though they're quite thin.

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

14 March 2026NJT11510

Comfortable, soft and well-fitting

Originally posted on marksandspencer.com (UK)

Comfortable, soft and well-fitting. And great value.

Helpful?

14 March 2026BeedeBee

Great quality tops

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Really useful tops for layering. Have bought before and will do again.

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 March 2026Datar

Standard lightweight warmth

Originally posted on marksandspencer.com (UK)

These thermals are for me not too bulky. Always buy when in sale or sparks offers, so very good value. Just wish white ones were in stock online.

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

12 March 2026Driftwoodstyler

Snug and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I bought these in black a few years ago and I'd say the ones I bought this time are a little smaller. Great length though.

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

12 March 2026Cathie46

Excellent

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love the tops, they do exactly what they are meant to do. They are a good fit and comfortable to wear, plus I don't need to wear a bulky sweater on top now, perfect for this time of year. I would definitely recommend 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

12 March 2026Belindac1

Warm & cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Warm & cosy but not bulky so perfect to wear under ski gear or even normal clothes!

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 March 2026DizztheWiz

SUPER COSY THERMAL LONG SLEEVE TOPS

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I love these tops. They are an ideal weight for layering on colder days. The fit is really good. They provide a degree of warmth without being overwhelming. The price was very good. They wash well 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

11 March 2026GJDB

Super warm tops I wear them 6 months of the year

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great under wear super warm and cozy. I live in them. Jumpers or cardigans on top Perfect

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 March 2026Cats5

Great cozy top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely Warm top I've been wearing it to bed instead of my pjs top, so glad I bought two of 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

10 March 2026Newproudgranma

Great base layer for the winter months.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I love these tops. I wear them under my jumpers all winter. They are so soft and very comfortable. They wash well and keep their shape, no shrinkage.

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 March 2026Luna42

Really good thermal layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely light material that’s good for layering - wash’s well

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 March 2026Sheilas70

Great base layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These tops are a really good base layer to keep warm on the the colder days.

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 March 2026Kris2B

A great but for winter!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I have been buying these tops for years and wear them ( in different colours) all through the winter. I much prefer these unlined ones, as they are a better fit under clothes. I just wish there was still a wider choice of colours.

Reviewer Ratings

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True to size

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Reviewer Ratings

How do you feel about the size?

True to size

08 March 2026Louie15

Great underlayer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Perfect for an extra warm layer under jumpers. Nice and stretchy and because it clings doesn't add bulk.

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 2026Eustacia

These last for years

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

The perfect layer underneath any clothing- so comfortable you forget you are wearing it. Worth every penny.

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

05 March 2026Savishopper50

Thermal under top

Originally posted on marksandspencer.com (UK)

Bought for a trip to chilly New York.. The thermal under top was a welcome choice .. was cosy and light,no bulk !

Reviewer Ratings

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True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

03 March 2026Who cares after trying

Heatgem vest

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Light weight under jumpers but add an extra layer.

Reviewer Ratings

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True to size

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Reviewer Ratings

How do you feel about the size?

True to size

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