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M&S

Heatgen™ Maximum Thermal Long Sleeve Top

£28

Colour

Size

Also available in: Long Johns and Vest
Free standard delivery over £60

Product code: T147404W

About this style

This maximum warmth thermal vest is ideal for wearing in extremely cold conditions. Designed in a regular cut with stretchy ribbed neck and cuffs for an improved fit. Long sleeves and a ribbed texture with super soft seams for ultimate comfort. Our clever Heatgen™ technology uses an innovative fibre blend, helping your body to generate and retain heat so you can stay warm when the weather gets chilly.

Maximum warmth for keeping cosy in colder climates.

Details & care

Style

Regular fit

Features

Thermal

Soft and cosy brushed fabric that keeps warmth in

Heatgen™ technology

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

Composition

35% wool, 26% polyester, 23% viscose and 16% polyamide (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Tumble dry medium temperature

Iron at low temperature

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 (858)

4.8

71% Recommended this product

Mentions
15 October 2025Bagel8
Verified Purchase

Thicker than the ‘medium thermal’.

Yes, I recommend this

Fits larger size ladies, size 30-32. Wish M&S would do larger sizes in the women’s section. The Best thermals.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

12 October 2025Mb28
Verified Purchase

Warm as Toast

Yes, I recommend this

Have purchased this product before in previous years, great for keeping you warm in cold weather.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

11 October 2025Jont123
Verified Purchase

Good quality. Lovely and warm.

Yes, I recommend this

I've a couple of these already, but as I feel the cold easily I added another to my stock.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

06 October 2025Alistair248
Verified Purchase

Too early to tell.

It looks good but waiting for winter to see just how good.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 October 2025Gray1234
Verified Purchase

Fits well.

Yes, I recommend this

Fits well, good warmth. Would recommend this product.

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

04 October 2025Cromane
Verified Purchase

Winter warmer

Yes, I recommend this

Lovely soft warm material. Have purchased before for elderly family man

Helpful?

03 October 2025Olliemax13
Verified Purchase

Would recommend.

Yes, I recommend this

Very good quality and exceptionally warm to wear during the cold months. Getting older in my years I now feel the cold a lot more. These Heatgen certainly keep me warm, would recommend

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

29 September 2025Maggie M 22
Verified Purchase

Superb quality!

Yes, I recommend this

Unable to give Review yet as have sent these Thermal items to my elderly brother in USA for his Xmas present!!! He’s particularly asked me to send them….he has had them before & can’t get anything to match the quality & effectiveness in USA!!!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

23 September 2025Paul L W
Verified Purchase

Winter essential.

Yes, I recommend this

Great quality, and super warm. A CERTAIN winner when the winter season arrives.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

21 September 2025gillywillywang
Verified Purchase

Great

Excellent buy these every year for my husband to wear

Helpful?

20 September 2025S L J
Verified Purchase

Excellent for winter months.

Yes, I recommend this

Needed for winter.. so cosy and warm. Very comfortable and easy to wear

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

15 September 2025BEBJM
Verified Purchase

Thermal Top

Yes, I recommend this

Only marked 4 as I have only taken the item out of the package .it looks good quality and will be warm when cold .True to size .

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

15 September 2025Patsy S
Verified Purchase

Great quality

Yes, I recommend this

I have bought this product many times before and as always it doesn’t disappoint. Super warm & great quality, ideal for the colder months ahead.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 September 2025Jen 96
Verified Purchase

Excellent buy

Yes, I recommend this

, excellent thermal we use them when it’s very cold for sleeping in . Can highly recommend, they don’t let you down.good quality and snug

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

17 April 2025Agathaspot
Verified Purchase

Perfect thermal vest.

Yes, I recommend this

My husband wears these thermal tops all through winter. They wash well and keep their shape. Good quality and extremely durable.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

10 April 2025CarolG55
Verified Purchase

Toasty warm

Yes, I recommend this

My husband is outside a lot and this has kept him toasty warm during the days when there has been a very cold wind. He recommends.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

07 April 2025Nuno T
Verified Purchase

Works well

Yes, I recommend this

Nothing bad to say about this product, except price.

Reviewer Ratings

Quality

Excellent

Value for Money

Average

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Average

How did it fit?

A bit large

30 March 2025Dort64
Verified Purchase

Great quality!

Yes, I recommend this

Nice.comfortable and warm.Easy wash and dry.Easy wash

Reviewer Ratings

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

17 March 2025Sundrop
Verified Purchase

Warm, comfortable and good quality.

Yes, I recommend this

Warm, comfortable and soft to wear. Great quality, washes very well, keeps its shape and doesn't shrink. Liked it so much I bought 2 more.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

13 March 2025Steve long arms
Verified Purchase

It fits!

Yes, I recommend this

Comfortable long sleeve that fits my long arms, unlike so many others. My main reason for choice. Also like the quality.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

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