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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 (1253)

4.8

79% Recommended this product

Mentions
05 November 2026Zookeeper mum
Verified Purchase

Warm and comfortable

Yes, I recommend this

Daughter already has these tops. I find them warm and comfortable when cycling. L9ok good as a top or underneath other garments

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 November 2026Anniestone
Verified Purchase

Super cosy

Yes, I recommend this

Very soft and warm for this time of year. Very pleased with my purchase.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 November 2026Curveynan
Verified Purchase

So warm!

Yes, I recommend this

Lovely warm thermal top. Just love them to keep me warm under jumpers. If you feel the cold like me this thermal top is ideal. Washes well too.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 November 2026
Verified Purchase

Great quality

Yes, I recommend this

Brilliant staple this winter. So soft and comfy, bringing that warm feeling wherever I go. It’s snug but I wanted it so it can fit under jumpers and blouses.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 November 2026nanny2kids
Verified Purchase

Lovely soft warm top

Yes, I recommend this

Lovely soft warm top to wear either on its own or under a jersey/blouse does come up small (I’m size 16 in M&S) so bought size 20 like other reviewers & it fits snugly

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

01 November 2026Nick and Pearl
Verified Purchase

Excellent, extremely warm.

My 94 year old mother thinks these thermal tops are amazing, she is so happy as they keep her very warm and cozy.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 October 2026powerM
Verified Purchase

Definitely small

So I ignored all the reviews about how tiny this is... Don't do that! I'm usually a 10/12 and thought the 12 would do because I wanted it quite tight to keep me warm as that's the point of thermal-wear... I mean, it fits but it is TIGHT. Definitely needed a 14 for looser, more comfortable fit.

Helpful?

29 October 2026Miss Nice Lady
Verified Purchase

Size up

Yes, I recommend this

Size up very tight fitting but fabulous shade of brown

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

29 October 2026Suzyshopaholic
Verified Purchase

Love these tops

Yes, I recommend this

Love, love, love these tops and I have them in every colour available. They're super soft and cosy and really warm for a cold morsel like me. Perfect for under fleeces and tops. If I was being pernickety, the only thing I wish, is that they weren't quite so long, because even if I tuck them into my knickers, they bunch up at the top of the legs and show if you're wearing tight fitting trousers or jeans. Having said that, I still think they're the best on the market. Would love to see some vibrant colours in them, like bright pinks and reds, because they look good enough to show under jackets or flannel shirts.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

29 October 2026Julieannxx
Verified Purchase

Way too tight and extremely long

No, I don't recommend this

Ridiculously tight and way too long. No stretch whatsoever and you would need to be six foot tall for this to fit. Had to return and shop elsewhere.

Helpful?

27 October 2026Hulagirl
Verified Purchase

Warm and comfortable

Yes, I recommend this

Good quality, comfortable and warm washes well and dries quickly. I wear for my 6am dog walk and they are great

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 October 2026No socks showing
Verified Purchase

Cosy

Yes, I recommend this

Really cosy and warm however for me I found the next too high

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

26 October 2026Brinleysmum64
Verified Purchase

Soft, warm and a great fit!

Yes, I recommend this

I love these thermal tops and have them in various colours. Great worn on their own or underneath a blouse or jumper.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 October 2026InternationalBeauty
Verified Purchase

Cosy brown top

Yes, I recommend this

Great thermal top which I am wearing under jackets and gilets. Very small fitting so I sized up 2 sizes to suit.

Helpful?

22 October 2026SarahT81
Verified Purchase

A beautifully thick but fitted thermal…

Yes, I recommend this

I’m someone who really feels the cold so am so pleased to add this to my thermal collection. It’s thick but fitted…I did size up 2 sizes as per other reviews & it fits perfectly. Would recommend.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

21 October 2026Miss una
Verified Purchase

Great thermal vests

Yes, I recommend this

Good fit good quality l have six vests in different colours and styles . They keep you warm without having to be bulky

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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?

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