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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 warm thermal baselayer top combines effective heat retention with everyday comfort. The regular fit with stretchy ribbed neck and cuffs keeps its shape, while the long sleeves provide coverage for cooler winter days. Perfect as an undershirt or standalone layer, it's made with 35% natural fibres for insulation and featuring Heatgen™ technology that retains body heat in cold conditions. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

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 (876)

4.8

71% Recommended this product

Mentions
08 November 2025BBLiverpool
Verified Purchase

Super cosy

Yes, I recommend this

These are brilliant. Super warm, feel so soft, and the length is perfect. They wash perfectly and dry with little effort. Highly recommended. However, they are on the pricey side, but you do get what you pay for.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 November 2025HennieH
Verified Purchase

Very pleased

Yes, I recommend this

Great top. Good quality and very warm. My son loves it.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 November 2025Geoff the 80 yr old
Verified Purchase

Warm at last!

Yes, I recommend this

Nice and long. Excellent feeling of instant warmth. Fits well.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 November 2025Tim he him
Verified Purchase

Great value and quality

For the last 3 years i have bought 3 sets of these thermal vests in October. It gives me 1 in wash, 1 wearing, and 1 spare. I alternate these weekly. At the end of each year I donate these to Ukrainian soldiers or civilians for winter wear. Great value .

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 November 2025JackieAB30
Verified Purchase

Very warm and cosy

Yes, I recommend this

Bought this for my son to wear on an outdoor activity - kept him really warm and cosy. Nice and thick.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 November 2025ReazonsB84
Verified Purchase

Get what you pay for

Great quality and style as a price you would always expect

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 November 2025Agatoni1
Verified Purchase

Good quality warm top

Yes, I recommend this

True to size. Great quality, nice and warm. I am very pleased with the purchase.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

31 October 2025shortertrouserswanted
Verified Purchase

Warm

Ordered the grey it is on the large side not sure if I should have re ordered a smaller size but it is comfortable and plenty warm enough

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

31 October 2025Valsgal
Verified Purchase

Really cosy and warm tops.

Yes, I recommend this

I love these thermal tops as they are so warm. I am relying on them at the moment as the central heating isn't working! I do go up a couple of sizes as they are very snug.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

29 October 2025keeplooking
Verified Purchase

Great quality

Yes, I recommend this

This is a cosy and comfortable top for winter. Nice and long and a good fit.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

28 October 2025JAKYS
Verified Purchase

Thermal Tops

Yes, I recommend this

These Maximum Thermal tops are the best at keeping you warm and good value for money as they wash well

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

26 October 2025roy29
Verified Purchase

keep warm

Yes, I recommend this

good quality and long enough to cover my lower back

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

26 October 2025David Greathead
Verified Purchase

Dissapointing.

No, I don't recommend this

very disappointed, i ordered a size SMALL and the top was a LARGE in a small size packaging! Great shame however kept it.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

25 October 2025Bury51
Verified Purchase

Toasty

Yes, I recommend this

This is just what I wanted for my Husband because he feels the cold !

Helpful?

24 October 2025Bruno1957
Verified Purchase

Good quality product

Yes, I recommend this

Bought it for fishing and walking in the winter. Good thermal product. Washes well and keeps shape and softness.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 October 2025Alpaca17
Verified Purchase

Heatgen thermal top

Yes, I recommend this

My husband has worn these thermal tops for several years during the colder months. He finds them warm and cosy so wanted more to wear when the weather turns cold. I ordered recently before stocks run out. We would highly recommend M and S thermals for our colder weather as we cut down on heating the house.

Helpful?

18 October 2025windymollie
Verified Purchase

Great thermal

Yes, I recommend this

Lovely and toasty l wear under my coat so not bulky with jumpers and I’m lovely and warm, I always size up plus they are a nice length and very stretchy

Helpful?

18 October 2025Brown and Homely
Verified Purchase

Supersoft

I bought 2 of these and they did not disappoint. So soft, fit perfect with a feel of flexibility abd such a good price

Helpful?

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

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