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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

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 (678)

4.5

69% Recommended this product

Mentions
24 December 2025Paxotium
Verified Purchase

So soft

Yes, I recommend this

Excellent very soft comfy and warm. Definitely recommend

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

24 December 2025Catskathleen
Verified Purchase

Wonderful Thermal Top

Yes, I recommend this

I love these tops as they are cosy and warm in the colder weather. They can be worn under cardigans, fleeces or even jumpers if it is really cold, which it has been recently here in Cornwall.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

23 December 2025bellapooh01
Verified Purchase

Great value for super warmth and look good too.

Yes, I recommend this

Absolutely love these Heatgen turtle necks, they are a great fit, so warm and a great price for the quality. I have them in all the colours and sometimes wear them as a light sweater under a body warmer or on colder days they are great under a sweater. Keep introducing new colours M&S, some bright reds & vibrant greens would be great.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

22 December 2025Doraflora
Verified Purchase

Well worth buying

Yes, I recommend this

Very warm and comfortable, long in the body unless you're very tall I imagine

Helpful?

22 December 2025Sana75
Verified Purchase

If you only buy one item this year make it this!

Yes, I recommend this

My favourite item of clothing, I have invested in three as I wear them all winter long under all my outfits as they are incredibly warm. I have also invested in the footless tights.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

21 December 2025Racing Snake
Verified Purchase

Warm and toasty

Yes, I recommend this

I bought this to wear for work as I needed something lightweight but warm. This is lightweight but certainly does the job.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

21 December 2025Chilly lady
Verified Purchase

Warmest top

No, I don't recommend this

Wonderfully warm and soft. Makes a good protective layer under scratchy high neck jumpers. However, it is a peculiar fit across the front. Very crumpled, lumpy appearance instead of a smooth fit. Not a good look, but OK hidden under a jumper, so only three stars.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 December 2025Elbie2
Verified Purchase

Really warm

Yes, I recommend this

I really feel the cold but these heatgen items are really warm and make a significant difference to my comfort.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 December 2025Morgana 5155
Verified Purchase

Good quality and very warm, good value for money

Yes, I recommend this

Well fitting and really warm. Also a good choice of colour. The neck is good because it's not too high - useful for violinists!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 December 2025Little Patty
Verified Purchase

Really great buy.

Yes, I recommend this

Bought for my daughter, she is really pleased with the thickness and fit. It is very warm and she likes the neckline.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 December 2025lindiluatmands
Verified Purchase

Snug and warm

Perfect for layering. Fits snugly and a nice long length and love the scoop neck. Am usually a 12 but have gone for a 14 . Wash well too.

Helpful?

19 December 2025Bessiegirl
Verified Purchase

Warm cosy top

Yes, I recommend this

Lovely cosy and warm top. The reason for the 4 stars was the sizing. I am between a 10 and 12 but decided to size up to a 14 just in case. Good job - it’s very figure hugging to say the least but as I will be wearing a top layer doesn’t really matter . Not sure about the neckline either but it’s warm!!

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

19 December 2025Roll neck jumper
Verified Purchase

Warm thermal long sleeve top

Yes, I recommend this

Beautifully soft and warm, it’s lovely and long too. I’m 5’ tall and it comes down to my hips.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 December 2025Biddi
Verified Purchase

The best Thermal Top

Yes, I recommend this

Heatgen Maximum Thermal Top excellent very warm fits well good colour

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 December 2025Jeany 94
Verified Purchase

You need to size up!

Yes, I recommend this

Great looking item but I am a size 8 and found this far too tight fitting, including around my neck - almost like being compressed.

Helpful?

18 December 20254 pigeons
Verified Purchase

Ladies thermal wear

Yes, I recommend this

I’ve got different thicknesses and colours over the years the from M&S the latest to go under a lovely jumper I have got. Good quality and the price is definitely good. I’m on my 2nd lot of Cancer treatment, immunotherapy. It helps my immune system to target the cancer cells and kill them. So these tops help keep me warm. Thank you. M& S.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 December 2025zxcvbnm1234
Verified Purchase

Perfect versatile winter top

Yes, I recommend this

I love it. Thick, warm and non-irritating to sensitive skin

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

18 December 2025Cavaliers
Verified Purchase

Not forvme

Yes, I recommend this

Although this is a great product, the high neck didn’t suit me.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 December 2025ringside
Verified Purchase

Thermal top -soft and very warm

Great top with fleece inside and out. . Great to wear as an undervest in freezing weather or as a pyjama top on cold nights

Helpful?

17 December 2025Bahbug
Verified Purchase

Very disappointing

I have bought about 20 of this type of top over the years, different colours and all have been brilliant. These last two recent ones, although advertised the same, are different and very very disappointing.

Helpful?

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