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Heatgen™ Medium Thermal Crew Neck Top

Product code: T329222

About this style

This medium-rated thermal long sleeve base shirt features innovative Heatgen™ technology for superb warmth without bulk. The lightweight, supersoft fabric retains heat while the added stretch ensures comfort and flexibility as you move. With a classic crew neck, it creates the perfect foundation for winter layering while the smooth fit sits neatly under additional garments. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

Heatgen™ Medium Thermal Crew Neck Top

€22

Colour

Size

Matching items: Thermal Brushed Leggings
Free standard delivery over €75

Reviews (1082)

4.8

81% Recommended this product

03 April 2026SooziQoozi

Warm top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Perfect for putting under other clothes as an extra layer on very cold 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

01 April 2026troubledj

M&S quality nothing to disappoint.

Originally posted on marksandspencer.com (UK)

So soft, warm and just what I was looking for. I will be buying more colours

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 2026slie

Keeps you cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I have a few for myself bought this one for a 95 year old and she loves 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

31 March 2026Malady 2

Thermal vest.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This top is so soft, true to size, very comfortable to wear.

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

30 March 2026R Hogg

Brown Thermal top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very cosy to wear under sweaters. Lovely colour 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

29 March 2026HeatherJ

Good Thermal top if a little long

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

The thermal tops are really good value for money but I do find most of them really very long in the body which only increases when you wash them, however they are stylish and warm.

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

27 March 2026Yonzi

Warm and stylish

Originally posted on marksandspencer.com (UK)

Great top, warm and plenty of stretch, repeat order

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 March 2026M DNi photo available

Absolutely beautiful and very warm and comfortable

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Absolutely beautiful and very warm and comfortable.

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

22 March 2026ratattoire

Heatgen medium thermal vest

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This is one of three I have purchased I like the fit they are warm and comfy. I wear them under a gillet and older ones I now use as pyjamas with the matching leggings keeps me cosy. They wash well and I usually buy a size larger as I like a loose fit. I love the different colours available 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

21 March 2026cfos2703

Great every day cosy T-shirt

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I normally buy the scoop neck however they don’t seem to make them anymore. This was perfect though and will definitely buy more. I always size up a couple of sizes as they’re really tight otherwise.

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

17 March 20266Mumstheword3

Soft, soft, soft!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Well made and beautifully soft. Nice and warm in cooler days.

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

17 March 2026Soozinkenya

so snug

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought this top for a skiing trip. Fits well true to size and so cozy to wear under tops or jumpers

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 March 2026TJW8

Nice warm top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and warm. It’s a bit clingy, as I suppose it’s meant to be. I’m pleased I went up one size as I think my usual size would have been a bit too tight.

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

15 March 20263Bs Mum

Fabulous

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I have a few of these in different colours perfect close layer for under sweaters on chilly 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

15 March 2026Jadarb

Great product but pricey

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought to go under my work uniform. Is very warm but very expensive

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 2026Katsa

Soft and Warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Fitted t shirt which keeps cold out. Bought a second one.

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

13 March 2026Bush49

Great top to have

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These tops are so comfortable easy to wear and versitable, i have most of the colours

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 2026Mollyria

Molly

Originally posted on marksandspencer.com (UK)

Great product. Have several of these, to put under my jumpers. Keeps me warm.

Helpful?

12 March 2026Viv66

Great quality!!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Keeps me lovely & warm at the football as a base layer

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 2026TeamKris

A bit disappointed

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Bought a medium weight vest but found there’s not much difference thickness wise between that and the maximum. Also I don’t like the crew neck, much prefer a scoop neck which doesn’t show under different necklines. The alternative lightweight vests are paper thin so a lot to think about!

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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