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Heatgen™ Maximum Thermal Fleece Top

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.

M&S

Heatgen™ Maximum Thermal Fleece Top

£22

Colour

Customers say:

Fits true to size()
Size

Also available in: Tops
Free standard delivery over £75, otherwise from £3.99

Reviews (1237)

4.8

79% Recommended this product

Mentions
20 October 2026Lazyhostess
Verified Purchase

Cosy and comfy.

Yes, I recommend this

A really comfortable cosy top for layering, although could be worn as a top on it’s own too, not too clingy and true to size. Wish it had a roll neck then I’d orobably live in it till next Spring. Great colour, slots in nicely with Marks’ other bitter chocolate brown purchases.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 October 2026Patsy67
Verified Purchase

Lovely warm thermal top

Yes, I recommend this

I bought two of these tops to go with my thermal leggings. They are a nice length, wash well and do not need ironing. I ordered the next size up as they are a bit clingy and they fitted perfectly.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

16 October 2026jinc
Verified Purchase

Great quality

Yes, I recommend this

I love the Heatgen range of clothes for the winter time, they are great for layering

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 October 2026Thankyou1
Verified Purchase

Lovely colour

Just right for wearing under a waistcoat in this ovlety autumn weather.

Helpful?

13 October 2026Hillywack
Verified Purchase

Cosy and warm

Yes, I recommend this

Love these, have bought a number over the last few years. I work in an old Georgian building with no insulation in the walls so when the temperature drops you can feel the cold from the brickwork. These have helped a great deal in keeping warm, have also bought the thermal leggings

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 October 2026Nicbuch54
Verified Purchase

Great thermal top

Yes, I recommend this

Thermal top purchased as undergarments for. December trip to Finland. The top feels very warm, cosy and comfortable and fit true to size. .It's also quite long so will keep my midriff warm too. Very pleased with my purchase.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

09 October 2026MummyB100
Verified Purchase

Comfy & Cosy!

Yes, I recommend this

I bought 2 new maximum thermal tops this autumn, in aubergine and chocolate, they are a staple item in my winter wardrobe, very soft and warm, I think a slightly longer length this year which I like.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 October 2026CMH077
Verified Purchase

Very Small sizing

Lovely fabric and feels v soft BUT size is tiny! I bought a 20 for my mother but it fits me and I am a size 14. It measures 37 inches round the bust and doesn't have much stretch.

Helpful?

07 October 2026Kathy from Penwortham
Verified Purchase

Cosy thermals

Yes, I recommend this

I have bought these thermal tops before and they certainly keep you warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 October 2026HonorM
Verified Purchase

Great quality and super warm

Easy to wear, lovely colour and perfect for colder days, washes up well

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 October 2026miranda260
Verified Purchase

Soft warm and thermals

Yes, I recommend this

I love this thermal it feels warm and soft. I cannot wait to wear it. The change of colour to chocolate brown is to break down my last year black thermals.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 October 2026lili99
Verified Purchase

Great

Yes, I recommend this

I haven’t had to wear this yet but know it’s going to be very cosy. So soft and fleecy. Will be my base layer when on the golf course in the winter. Love how it sits high up on the neck/chest.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

29 September 2026DottyFlowers
Verified Purchase

Great!

No, I don't recommend this

Lovely fleecy good quality thermal top, can’t wait for the cooler weather!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 September 2026Resolution16
Verified Purchase

Really do "love that"

Yes, I recommend this

I have a large collection of these, added to every year.Glad to see the range of colours available is slowly increasing. They are comfortable to wear hold their shape wash after wash &I like having them in different heat settings. As a pensioner in a large unheated house with an extreme dislike of being cold & an even greater dislike of the way my electricity bill is going up these are indeed a few of my favourite things.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 September 2026MargaretAlison
Verified Purchase

Great Quality

As it says on the tin. Just as described on line Excellent quality, soft and warm.

Helpful?

12 September 2026Manxy1
Verified Purchase

Chocolate brown thermal top

Yes, I recommend this

I stock pile these in advance of the colder weather coming. I’ve got loads of these tops in different colours. This time I wanted chocolate brown. I actually wear these tops as outerwear & not hidden underwear. I’m a size 12 on my top half, but so these aren't too clingy I buy a size 14.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 September 2026LavenderandLace
Verified Purchase

Great in cold weather

Yes, I recommend this

Bought this top in chocolate brown, having purchased other colours in past years, Warm, comfortable and washes well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 September 2026Hay1ey82
Verified Purchase

Thermal Fleece Top

Yes, I recommend this

I have bought a few of these tops over the years. This one is just as cosy and soft. Lovely thick material, washes well and a gorgeous autumnal/ winter colour. I always size up in these, I'm a size 16 / 18 and got the top in a size 20. It's still snug, but I wear them under other toos so I don't mind it looking a little tight.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

30 August 20268yellowhoneybees
Verified Purchase

Soft comfortable top

Yes, I recommend this

I was very keen to buy these thermal tops. I like the fleece look and want to wear it as a top not an under garment. I prefer the crew neck to the high neck. I wish they did more colours, been trying to get the navy but the sizes are never in stock. Unfortunately they come up very small, had to return and buy a bigger size then still rather tight. I should have read the reviews before purchasing. Never the less soft and warm for winter just buy one or two sizes bigger.

Reviewer Ratings

How did it fit?

Very small

Helpful?

Reviewer Ratings

How did it fit?

Very small

28 August 2026Persil lady
Verified Purchase

Perfect.

These heat gems are lovely,very warm and snug,selection of colours so you can mix and match,wash beautiful too,great for winter under your jumpers.

Helpful?

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