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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, otherwise €4.50

Reviews (1124)

4.8

81% Recommended this product

Mentions
03 November 2026

One to keep !

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Soft and comfortable. For one of those winter days out when it’s sunny but still a little cold

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 October 2026KneeBeard

close fitting top

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

I haven't worn this yet thanks to the lovely mild weather we have been having lately! I have kept it in spite of the sleeves being far too long. The top is very close fitting even though I sized up to allow for this. I don't know how it will wash but most annoyingly it CANNOT be tumble dried, so I will not be buying another. I think it is over priced.

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

28 October 2026twe649

Essential winter garment

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

A lovely thermal warm and comfortable to wear. Ideal for wearing under my jumpers and with causal wear. A good price and quality item.

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 October 2026jot2014

Cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Cody, fits well on a size 8. Shorter in the body than in previous years.

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

22 October 2026Zookeeper mum

Good quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Good quality garment. Good value. Couldn’t get size in all 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

22 October 2026SuperHarrygeorge

Warm and cosy thermal top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I have at least ten of these tops . All different colours and necklines . I wear them all through out the year if the weather is cool . Amazingly cosy . Washes well and keeps its shape . Great value .

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

19 October 2026clasperpenny

So cosy

Originally posted on marksandspencer.com (UK)

These crew neck medium thermal vests are perfect. I am 5’2” tall and bought the extra small. Perfect. Fits very snuggly and so suitable for even a t shirt on top. Wish they made with turtle neck.

Helpful?

11 October 2026Barram

Warm baselayer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Really nice soft baselayer, keeps me toastie warm & comfortable when it's chilly & I out on a walk. The sleeves are slightly long but easy push them up abit

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 October 2026MiddleC

Lovely and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

My first Heatgen top and I’m impressed! Bought to try as a layer after suffering in the cold last winter and I think this will be a big help.The basic shades are always useful but it would be nice to have a couple of brighter colours 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

20 September 2026littleme638

Thermal crew top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought in readiness for the cooler days, primarily to wear under a pinafor. Its perfect. Close fitting , beautifully soft and very cosy to wear. Id definately recommend.

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

19 September 2026Maw4

Warm!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Does what it says on the tin. Lovely and warm and soft fabric. Will be great for 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

13 September 2026KazM61

Soft and Warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very pleased with my thermal top, it’s lovely and soft and warm, I have MS and dislike the cold, nighttime is worst for me in the winter so I actually use these thermals as pyjamas and it works really 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

22 August 2026AMT220311

Perfect wardrobe staple

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought as an autumn/winter basic. Great for layering but stylish enough to wear as a top. Lovely and soft. Can’t wait for cooler days to wear this.

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

07 August 2026GayM

Nice warm too

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice & warm top which will be great for 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

18 June 2026Leizel

Great Quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

The Heatgen was really beautiful. Unfortunately it was not a boat neck as promised in the details. I have had several of these before and the necks of those were much lower. I wear these under most of my clothing and rely on them to not show. This item can only be worn when it's very cold and I'm wearing something which covers it up completely

Helpful?

09 June 2026Hewlands7

Great product!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great product! Warm and cozy. Easy to wash and dry. Very snug fit…suggest get next size up!

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

31 May 2026ColetteF

Lovely cosy top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I love the feel and cosiness of these thermal tops, they are perfect for wearing in the house on cold days, but preferred the lower neck line of the previous ones I have

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 May 2026Ang989

Thermal wear top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great product. Material lovely, soft and has some give to it. This product will keep you warm in the cooler weather. Do this product in three colours all of which are nice. Good price for a quality product.

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

23 May 2026Szuan33

Cosy warm top.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Wonderful cosy warm top, perfect when the days have gone cooler, good length.

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 May 2026barbaraanne

Love this top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I already have this lovely top in another colour. It is very comfortable, feels good on. Easily washed and dried.

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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