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M&S

Heatgen™ Maximum Thermal Fleece Top

£22

Colour

Customers say:

Fits true to size()
Std Dress Size

Matching items: Thermal Leggings
Also available in: Tops
Free standard delivery over £60

Product code: T329225

About this style

Stay cosy during the coldest weather in our Heatgen™ Maximum Thermal fleece top. The high mock neck and long sleeves provide extra warmth, while the soft fleece with added stretch ensures a comfortable fit. Our warmest thermal technology yet keeps you snug without bulk, letting you embrace winter with confidence. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Item details

Model Height: 5ft9"/176cm

Model is wearing size: 12

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

Christmas delivery and collection last-order dates

Standard Delivery

Order by Saturday 20th of December

Nominated Day Delivery

Order by Tuesday 23rd of December

Store Collection

Order by Tuesday 23rd of December

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 (655)

4.5

68% Recommended this product

Mentions
15 December 2025DME19
Verified Purchase

Cosy

Yes, I recommend this

I've been wearing these everyday for the past few weeks

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025JenAD22
Verified Purchase

Fantastic winter top

I absolutely love these tops. I was a little worried about the neck to begin with, but actually I find it very flattering and not at all irritating. Literally living in them when its cold. Got all the colours. I have gone up a couple of sizes for the ones I want to wear as a top on its own, rather than a base layer. More colours please!

Helpful?

15 December 2025A crosland
Verified Purchase

Great quality and great for cold days

A great thermal under layer for very cold days when walking the dog. True to size and hugs well to the body to keep you warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025Jill55
Verified Purchase

Fabulously cosy comfort

Yes, I recommend this

Great quality, lovely and warm. Perfect for wearing under a coat. The new light colours available now are perfect.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 December 2025pigsmightfly
Verified Purchase

Fab top!

Yes, I recommend this

Great thermal very warm, sized correctly. So good I bought another straight away. Perfect for working outdoors or outdoor activities. Would love a zip neck polo in the same material please.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 December 2025loudburns
Verified Purchase

Perfect as a base layer

Yes, I recommend this

This thermal top is perfect as a base layer. It has a lovely soft feel against the skin and is really comfortable to wear. The raised neckline gives that additional snug feeling. It also looks great underneath a smart jacket. I now have a number of fleece tops which are perfect for this time of year.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 December 2025lolaling
Verified Purchase

Comfortable and warm

Very warm but too long. I love the quality - soft, warm and comfortable. I would recommend to friends!

Reviewer Ratings

How did it fit?

Large

Helpful?

Reviewer Ratings

How did it fit?

Large

13 December 2025Jills2174
Verified Purchase

Great quality

Yes, I recommend this

Comfortable and warm. Good stretchy, quality fabric.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 December 2025MarionMH
Verified Purchase

thermal fleece roll neck top in beige

Yes, I recommend this

reading the reviews I bought a size higher than normal and this was a great tip from existing customers. This fleece top is ideal for keeping cosy and warm with a beautiful bright beige colour below my chin to lighten my face in this dreary winter! long length was a bit of a surprise but means more warmth coverage, so I am happy.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 December 2025Greenic
Verified Purchase

Perfect maximum warmth top

Yes, I recommend this

Great maximum warmth top for trip to Lapland. Very good value. Bought leggings to match. Good value.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 December 2025QueenBean
Verified Purchase

Happy purchase

Very comfy and warm. Great quality. Look lovely with a fillet and knee high boots.

Helpful?

12 December 2025Rdua
Verified Purchase

Does the job!

Yes, I recommend this

Bought to wear under blouses and jumpers which have a lower neckline (I like funel or roll neck jumpers.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 December 2025Flor8a
Verified Purchase

Nice winter weight vest

Yes, I recommend this

Although you probably need to size up if you don’t want a clingy roll up thermal vest. Warm for colder days, and not as great quality as previous years , all in all do the job though

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

12 December 2025Smokeybear14
Verified Purchase

Toasty

Yes, I recommend this

I have about a dozen maximum thermal fleece tops and they really do the business.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 December 2025Tooty boys Mum
Verified Purchase

Thick cosy thermal

Yes, I recommend this

Bought the navy version and it’s lovely and cosy. Size 12 if I remember rightly and fits well, I’m a 10-12 usually.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 December 2025TKReader
Verified Purchase

Lovely warm top but size up!

Yes, I recommend this

Lovely and warm but you need to size up. I am a size 8 in M&S clothing but read the reviews and ordered a 10. The 10 is also a tight fit . The neck is a bit strange too. You have to fold it down. I do like it however and it really keeps the heat in. Just go 2 sizes up unless you want to wear if very tight!

Helpful?

10 December 2025Smita Sam
Verified Purchase

Very warm, soft & winter snug

Yes, I recommend this

It’s extremely warm - more for arctic weather. Lovely but a bit too warm for normal winter wear. I should have bought the mid range one.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 December 2025JaxGar
Verified Purchase

Brilliant

Yes, I recommend this

This is the best thermal top if you feel the cold so comfortable

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 December 2025MillyP123
Verified Purchase

Excellent thermal

Yes, I recommend this

Very warm and perfect as a matching set. Highly recommended

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

09 December 2025HerbertBlk89
Verified Purchase

Useful the Thermals

This thermal fleece top is very good. It has a nice soft texture and does not itch next to the skin. Colour is good. The fleece can be mixed with t-shirts or tank tops. Hopefully when washed it will retain its shape and be good on the environment.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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