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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 (1114)

4.8

81% Recommended this product

Mentions
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

19 May 2026Jude1964

Lovely cosy fleece vest

Originally posted on marksandspencer.com (UK)

Lovely thick warm cosy fabric, fits well, nice chocolate brown colour

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 May 2026110H

Good value

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought it for physio sessions but also wear it under jumpers to keep me 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

13 May 2026Crumbsdad

Cosy layering top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Staple wear for wearing as layers. Wash well. Good colours. Come up very small.

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

11 May 2026bracknellbabe

Cruise wear

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought to take on cruise to the Fjords as it seems to be layers is the thing to wear. Hopefully they fit the bill.

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 May 2026Cesira

Super soft and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love this item sooo much that after trying out one ,I bought another 4! 2 long sleeve and 2 short sleeve.

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 May 2026A Allen

Good quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

How to go two sizes up as I don't like anything tight lovely material nice and warm

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

29 April 2026Ellejee

Ladies thermal tops.

Originally posted on marksandspencer.com (UK)

A litle snug, but good arm and body length. Unfortunately thicker than I would prefer for a layering thermal top.

Helpful?

27 April 2026anne_bh

A go to winter essential

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I love these well fitted great quality thermal tops Since loosing a lot of weight I now feel the cold and these tops have been so helpful More colours would be appreciated

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 April 2026Chrissbb

Excellent fit and really comfortable.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

So lovely and warm just right for winter and spring. Excellent material which does not come off on skin.

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 April 2026LostScot

Just what I needed

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Good quality but I’m taking no chances - it’s NEVER going in tumble dryer. I’m fed up with M&S items shrinking!!

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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