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M&S

Heatgen™ Maximum Thermal Fleece Top

£22

Colour

Customers say:

Fits true to size()
Size

Also available in: Tops
Free standard delivery over £60

Product code: T329224

About this style

Embrace warmth with this Heatgen™ Maximum Thermal Fleece top. The luxuriously soft fleece fabric features our innovative Heatgen™ technology for superior insulation during the coldest weather. Long sleeves and added stretch ensure a comfortable, flexible fit that moves with your body while maintaining heat retention. The sleek design makes it perfect for layering or wearing alone for maximum thermal protection. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Item details

Model Height: 5ft10"/178cm

Model is wearing size: 12, 14

Style

Added Stretch

Features

Heatgen™ technology

lightweight and supersoft, designed to keep you warm when the weather gets chilly

Composition

55% acrylic, 37% viscose and 8% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

Do not dry clean

Delivery, collection & returns

Delivery

Standard

UK Standard Delivery is available for £3.99 or free on orders over £60 (excluding furniture).

Nominated Day

UK Next Day Delivery and UK Nominated Day Delivery (excluding Northern Ireland) are available for £5.99 (excluding furniture)

Collection

Collect from store

Store collection is free on all fashion, home and beauty orders.

Returns

UK returns

Free

Exclusions apply

Full delivery and collection informationOur returns policy

Reviews (1097)

4.8

78% Recommended this product

Mentions
05 February 2026KHooper
Verified Purchase

Lovely quality

Yes, I recommend this

Soft, cosy and really comfortable. Fits true to size and is really warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026msMnS
Verified Purchase

Confortable cosy and warm

Yes, I recommend this

Lovely garment bought in two colours, it’s like a cuddle so cosy and comfortable

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026LMO123
Verified Purchase

Lovely warm tops

Yes, I recommend this

These are lovely, soft and warm. I bought these for cold football matches, but now I wear them all the time! I now have 3!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026Sazloujac
Verified Purchase

Great for extreme temperatures

Yes, I recommend this

This top is super cosy fleece and very warm. Fits snug but not tight, ideal for fitting under clothes

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 February 2026emmygold
Verified Purchase

Pleased with the quality

Yes, I recommend this

Very soft, you can't even feel it's fleece, gives lovely nice aficionado later for colder weather.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

03 February 2026Pixie 1111
Verified Purchase

Good quality

Yes, I recommend this

Soft and warm , no itchy seams .A little long in body for a 5ft 2 " person

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

03 February 2026Jigaholic
Verified Purchase

Excellent in every way

Yes, I recommend this

The product is excellent value for money. Well made, and the colour is dense. It arrived in a timely fashion, and was well wrapped. It feels lovely on the skin, and doesnt overheat the body. The length is good because it covers the back well.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

03 February 2026Deirdreb
Verified Purchase

Deirdre

Originally posted on marksandspencer.ie

Love these thermal tops, so warm and soft and great value.

Helpful?

02 February 2026Disappointed 37
Verified Purchase

Cosy

Lovely, cosy base layer in an extremely comfortable soft fabric

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 February 2026Lou 27
Verified Purchase

Theses tops are brilliant

Yes, I recommend this

I bought three of these tops brilliant so warm and soft. I went up a size because they are snug. My daughter thinks the same.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

02 February 2026B Alsford
Verified Purchase

Cosy!

Yes, I recommend this

Effective and feels nice to wear. I wear this with the medium heatgen top which works well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 February 2026Jes100
Verified Purchase

Lovely and warm

Yes, I recommend this

I have one of every colour available in this thermal top as they are so nice and warm and a good fit, though I am always inclined to buy one size larger than I normally would because I prefer thermals not to be tight.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

31 January 2026poopsy
Verified Purchase

Not true in size

No, I don't recommend this

Nice and soft thick fleece top, the neck line is fairly small and the size’s are not true. I had to go up two sizes bigger but still found the hem width small being tight.

Helpful?

30 January 2026sisiphusy
Verified Purchase

love all these heatgen tops

Yes, I recommend this

love these tops I have them in 7 different colours and in different heatgen materials. I love the light ones during warmer seasons and the thicker ones during winter. The material washes well they do run a bit small but I usually size up so they wont ride up on my stomach etc.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

30 January 2026laurag
Verified Purchase

So warm

Yes, I recommend this

Already had one in white. So good with this cold weather

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

30 January 2026Soraya B
Verified Purchase

Good quality

Yes, I recommend this

Good quality , thick and warm. I sized up as it’s a snug fit . Very pleased with it

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

29 January 2026Lou037
Verified Purchase

For people who are always cold

Originally posted on marksandspencer.ie

So soft, so warm, so comfortable. Worth every cent.

Helpful?

29 January 2026Melfish
Verified Purchase

Fab

Yes, I recommend this

Lovely and soft but very warm. The quality is great too!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 January 2026
Verified Purchase

Keep me warm

Yes, I recommend this

Loveeee it so much ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 January 2026Shirley 81
Verified Purchase

Snug

Yes, I recommend this

Lovely warm garment, goes well under slim jumpers.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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