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M&S

Heatgen™ Medium Thermal Long Sleeve Tops

£20

Colour

Size

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

Product code: T148813N

About this style

For warmth on colder days, this thermal long sleeve top features our innovative Heatgen™ technology for medium-warmth comfort. The regular fit allows for easy layering as a baselayer, while the stretchy ribbed neck ensures a comfortable fit. Featuring supersoft seams and insulating brushed back fabric for maximum comfort when temperatures drop, making it an ideal base layer top for cold weather. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Medium warmth for wrapping up in moderately cold conditions.

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

50% cotton, 26% polyester and 24% viscose (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Tumble dry medium temperature

Iron at medium temperature

Do not dry clean

Delivery, collection & returns

Christmas delivery and collection last-order dates

Standard Delivery

Order by Saturday 20th of December

Nominated Day Delivery

Order by Tuesday 23rd of December

Store Collection

Order by Tuesday 23rd of December

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 (1035)

4.7

70% Recommended this product

Mentions
12 December 2025GCross
Verified Purchase

Great Product

Yes, I recommend this

Fabulous quality and does the job! Super warm but still thin enough to layer up.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

11 December 2025Joe999x
Verified Purchase

Perfect thermals

Yes, I recommend this

Great fit , hardly aware of the extra layer and certainly make a difference when walking or working outside. Highly recommended

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 December 2025Mje59
Verified Purchase

Great quality

Yes, I recommend this

Highly recommend these warm and great quality item

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

08 December 2025gilhams
Verified Purchase

Really warm

Yes, I recommend this

Really warm and cosy, fits well and does the job - good value

Helpful?

08 December 2025Shiftyooooooo1
Verified Purchase

Good quality as what you would expect from M&S

Yes, I recommend this

Bought to keep me warm when walking the dog 🙂 He can sniff away as long as he likes now

Helpful?

06 December 2025JillEW16
Verified Purchase

Great thermal top

Yes, I recommend this

Lovely soft thermal top, great layering piece. Comfortable

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 December 2025
Verified Purchase

Perfect for Winter weather

Yes, I recommend this

Bought this for my son -in-law for his birthday, but it looked perfect for a base layer when he’s walking in the Winter weather!

Helpful?

01 December 2025Louise4142
Verified Purchase

Good quality to wear under a work/school shirt

Yes, I recommend this

I bought these for my son to wear under his school shirts as he doesn’t like wearing a coat and has been getting a bit cold at school. He’s 16. We tried the size M to begin with but they were a bit baggy and far too long in the body. The small was a good fit for him, he is 5ft 9. Long enough to tuck in but not too long. They aren’t bulky and he feels much warmer with them under his shirt and blazer. The only thing that shocked me slightly was paying £100 for 5 long sleeved vests, which I do think is quite steep. Having said that they are good quality and I would recommend them.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 December 2025Subel47
Verified Purchase

Warm and comfortable

Yes, I recommend this

My husband loves this thermal top so now I must send for a couple more It has washed well and kept its shape.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 November 2025chrisp54
Verified Purchase

Great quality good price, and so warm

Yes, I recommend this

Great quality warm and brilliant price, especially when watching outdoor sports

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 November 2025Soooks
Verified Purchase

Lovely and warm.

Yes, I recommend this

Goodness, what a difference to wearing a cotton T shirt, these are really warm to wear.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 November 2025Drew65
Verified Purchase

Drews

Yes, I recommend this

Very good quality item and good value for the money 👌

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

27 November 2025TJH83
Verified Purchase

Great buy

Comfortable. Very good fit. Pleased with purchase.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

20 November 2025Hazel291166
Verified Purchase

Great quality

Yes, I recommend this

Lovely quality, fairly thick n will keep us nice n warm

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 November 2025Dwy
Verified Purchase

Just Right for winter comfort

Yes, I recommend this

Comfortable to wear just under a sweater indoors👍👍

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

15 November 2025Medj7
Verified Purchase

Warm and comfortable. Excellent value.

Excellent. Used as Nightwear. Maroon nice colour, almost elegant!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 November 2025Tailgate106
Verified Purchase

Cosy & Toasty

My husband is very pleased with this. True to size and very soft.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

13 November 2025Happyrambler
Verified Purchase

Warm vest

Warm vest to wear under clothing. Comfortable to wear and is true to size.

Helpful?

13 November 2025route10
Verified Purchase

Good product

Great product well made very soft to touch . Warm when worn

Helpful?

12 November 2025CHEPI1
Verified Purchase

Warm Soft and cosy to wear.

Yes, I recommend this

Great to wear when the weather gets colder and keeps thd cold out.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

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