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Heatgen™ Thermal Long Sleeve Top

Product code: T329100P

About this style

This Heatgen™ thermal top keeps you cosy when temperatures drop. The soft fabric features innovative thermal technology that helps insulate your body for lightweight warmth with a super-soft feel against your skin. Long sleeves provide extra coverage, while added stretch ensures all-day comfort and ease of movement. The top is perfect as a baselayer shirt under your favourite winter and cold-weather outfits. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Please don’t worry if the packaging name looks a little different. Its still the same colour our packaging just takes a little longer to update. Rich Amber formally known as Light Brown.

Details & care

Item details

Model Height: 5ft 10"/178cm

Model is wearing size: 12

Care and composition

Features

Heatgen™ technology

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

Composition

65% acrylic, 30% viscose and 5% elastane (exclusive of trimmings)

M&S

Heatgen™ Thermal Long Sleeve Top

Sorry, this item is no longer available

Reviews (220)

3.7

62% Recommended this product

Mentions
06 April 2022Luckyshopper1

Warm and cosy and yet still stylish top.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I love a thin top to layer under a sweater, this one is attractive enough to wear as an outer item, it's comfortable and I like the gingery colour animal print. It keeps me warm without feeling bundled up?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

True to size

27 March 2022Beelady63

Thermal top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely product, a little snug but that’s not a problem underneath other tops as I plan to use it.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Good

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Good

How do you feel about the size?

A bit small

22 March 2022RachelKH

A good buy but watch the sizes as they vary

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I have a lot of these thermal tops which I wear constantly throughout the colder months. They usually fit well wash well and are very comfy. I bought this one in the sale. It fits well around the bust and shoulders but is a little tight around the stomach and hips.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Good

Warmth

Warm

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Good

Warmth

Warm

How do you feel about the size?

A bit small

17 March 2022Poll26

Thermal vest

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Even though I ordered a size up it still is tiny!However I’ll keep it to wear under sweaters and hop thermal qualities work

Reviewer Ratings

Quality

Good

Value for Money

Average

Style

Average

Comfort

Average

Warmth

Moderate warmth

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Average

Style

Average

Comfort

Average

Warmth

Moderate warmth

How do you feel about the size?

Small

13 March 2022JanRav4Yorkshire

Heatgen Top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I absolutely love these Heatgen tops. I bought size 8 (this is my usual size) and it fits perfect. I have quite a few but M&S don’t do a big enough selection anymore otherwise I would have purchased more

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

13 March 2022

Multifunctional

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Warm yet thin. Fits really well. Wear under or over.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

True to size

09 March 2022Mirsy

Bad fit.

No, I don't recommend this

Size 16 was ridiculously tight. Struggled to get my arms into it. A shame as the other colours are true to size?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

09 March 2022KateP18

Thermal long sleeve top

Originally posted on marksandspencer.com (UK)

Comfy but not especially warm. Bit too long in the body & sleeves too long.

Helpful?

05 March 2022Ab BJ

Wrong mail order

Originally posted on marksandspencer.com (UK)

Wrong size was delivered.. no replacement was available.. received a refund from the shop

Helpful?

13 February 2022Dottyannie

Love these

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love these and have a few - comfortable and easy to wear either on its own or as a base layer …. can’t fault these and it’s great to get a nice pattern.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

07 February 2022siob

Does the job perfectly

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Quite a snug fit, which is good when layered under other clothes.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Warmth

Moderate warmth

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Warmth

Moderate warmth

How do you feel about the size?

Small

06 February 2022Juillet

Perfect

Originally posted on marksandspencer.com (UK)

Love it…fits perfectly…good for layering in the cold weather. Good price.

Helpful?

03 February 2022Junemag

Very warm thermal long sleeve top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Warm and comfortable to wear, like the long length

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

30 January 2022Lunarcraft

Absolutely brilliant and perfect item.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This top is extremely comfortable, easy to wear and wonderfully warm. I am actually wearing this to on its own, with no need for a further layer.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

Very large

27 January 2022Zivadavid

Warm and Cosy base layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Another warm base layer excellent for putting under jumpers and tops. I'm so glad I found these cosy thermals that really work

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Warmth

Very warm

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Warmth

Very warm

26 January 2022Moonbeam66

Very very small fitting,order up a couple of sizes

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

I’m usually an 8 but they looked quite snug fitting so I ordered a 10 and an 8 just in case. I had to send both back as I looked like a trussed up chicken even in the 10. These are so tight they show every lump and bump and even worse, I’m pretty slim but looked like I had rolls of fat…and that was just when I was stood up, I didn’t want to see what it looked like sat down. Not for me I’m afraid, you need to order at least 2 sizes up.

Reviewer Ratings

Quality

Average

Value for Money

Good

Style

Good

Comfort

Average

Warmth

Warm

How do you feel about the size?

Very small

Helpful?

Reviewer Ratings

Quality

Average

Value for Money

Good

Style

Good

Comfort

Average

Warmth

Warm

How do you feel about the size?

Very small

25 January 2022TSTKowloon

Versatile thermal top

Originally posted on marksandspencer.com (UK)

versatile thermal patterned top ideal for layering.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

25 January 2022crispychic

Thermal Top

Originally posted on marksandspencer.com (UK)

I am normally size 12, but after seeing reviews that indicated the top was skimpy, I ordered a size 14 - I will normally wear it under a gilet or cardi, so it needs to be comfortable, rather than a good fit. Pleased with the top.

Helpful?

23 January 2022Tisswas

Keeping you warm without weight.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

They are light and comfortable to wear and so warm, can go under any top with out bulk. I’m a size 24 but can easily get into a size 22

Reviewer Ratings

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

How do you feel about the size?

Very large

22 January 2022Jez1950

Lovely and warm. Good for layering now it winter.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love this top but small for size it is. More like a 10. I wear it for bed so its ok but could be worn anywhere. It is a lovely top and would go lovely with pants and jeans. I bought 2 and kept both and wear them both a lot under sweatshirts.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

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