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M&S

2pk Heatgen™ Thermal Long Sleeve Tops

£25

£12.50

Colour

On Sale

Customers say:

Fits true to size()
Size

Free standard delivery over £60

Product code: T329101M

About this style

These thermal tops from our M&S Collection keep you cosy during cooler weather. The long-sleeved style provides excellent coverage while the supersoft fabric with added stretch ensures comfortable all-day wear. Featuring our innovative Heatgen™ light technology, these baselayer shirts provide extra insulation without bulk for lightweight warmth when you need it most. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Style

Heatgen™ technology

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

Added Stretch

Features

Heatgen™ technology

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

Composition

67% acrylic, 28% viscose and 5% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

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 (147)

4.6

66% Recommended this product

Mentions
18 December 2025Labiz_
Verified Purchase

Awesome quality

Yes, I recommend this

Does what it says!!…prepare to feel warm and cosy with these thermal wears. They are meant to be fitted and they sure keep the windy weather away from your skin.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025Angelinos
Verified Purchase

Vests have changed size

No, I don't recommend this

These vests used to be lovely, but the sizing has changed and they are now about 4” too long in the body and about the same amount too long on the arms, making them both impractical and uncomfortable to wear. Very disappointed.

Reviewer Ratings

How did it fit?

Very large

Helpful?

Reviewer Ratings

How did it fit?

Very large

13 December 2025JB3boys
Verified Purchase

Perfect!

Yes, I recommend this

These are very comfortable and long enough in the body that I stay warm. Very pleased with them! Lovely and warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 December 2025Catskathleen
Verified Purchase

Lovely warm and comfortable tops

I love these tops as you can get them in various thicknesses. In autumn and winter they are a wonderful addition to tops to keep you warm, particularly when going out.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 December 2025Long suffering
Verified Purchase

Cosy and Long

Yes, I recommend this

I am very pleased with my thermal vests and they are long too so well tucked in keeping me nice and warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 November 2025AnitaD
Verified Purchase

Thin

No, I don't recommend this

Very thin, doubt if they’ll keep my 95 year old mum warm. Returned and purchased thicker ones

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 November 2025Lolly Lou
Verified Purchase

Light but warm

Yes, I recommend this

Soft and warm but light enough to be worn under a blouse without it feeling bulky. It’s a long length but that suits me fine as it can be tucked in easily for extra warmth. They was well and keep their shape.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

23 November 2025Berkshire girl
Verified Purchase

Exactly what I needed

Yes, I recommend this

I was concerned at first that my usual size 12 was too snug despite the stretch. Having now worn them I am very pleased with my purchase. The snug fit especially on the arms makes it possible for the thermal vests to fit under any garment including a long sleeve T shirt.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 November 2025AntheaC
Verified Purchase

Excellent thermal top

Excellent thermal top, light fabric in neutral light grey, so slips invisibly under jumpers. Washes well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

09 November 2025Ibolya
Verified Purchase

Great purchase

Perfect sizing and very soft material, washes well too

Helpful?

09 November 2025Belacqua
Verified Purchase

Long and clingy in a good way

Yes, I recommend this

Extra long for tucking in. Clingy but not tight. Very soft and comfortable. I'll be buying more of these.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 November 2025lifelongshopper
Verified Purchase

Perfect, versatile top

Yes, I recommend this

I have several of these tops now in different colours. I find you can wear one as a thermal layer under another top, in very cold weather, or simply as a top by itself. The material is extremely soft and warm, and is very smooth against the skin. It washes well and dries easily, does not crease, and this long sleeved style is so versatile -- you can add a scarf, a sleeveless jacket, you can use it for sport or relaxation. My only gripe is with the sizing. I am a size 12/14 but I have bought my Heatgen tops in 18.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

02 November 2025Keep warm this winter
Verified Purchase

2 pk Heatgen Womens thermal long sleeve vests

Yes, I recommend this

Perfect fit lovely warm vest and a good price Definitely recommend

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 November 2025N K
Verified Purchase

Super warm

Yes, I recommend this

Lovely and comfortable and warm. I happy with the item

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 October 2025Steph53
Verified Purchase

Excellent

Yes, I recommend this

I bought these last year, so impressed I bought another pack this year and the same for my daughter in law. They retain the heat without being bulky so great to wear under anything. I would highly recommend. They wash well and retain their shape, quick to dry too.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 October 2025groupie
Verified Purchase

Great quality

Yes, I recommend this

Bought these to use as a base layer. Very soft and good quality

Helpful?

28 October 2025lookingforsummerclothes
Verified Purchase

Great value

Yes, I recommend this

Bought to replace previous tops. Great value, warm but not too warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 October 2025Chrise
Verified Purchase

Lovely undergarment

Great Tops lovely and soft. Kept me warm under a thin jumper.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 October 2025Pizzle
Verified Purchase

Great autumn basic

Yes, I recommend this

These thermal tops are perfectly thin, i.e. not too thick and too warm. They work well under a shirt or sweater. They are very slim but stretchy, I took my regular size 10 and they feel good and are comfortable. The grey is a perfect neutral but can we have more of the cream please, they're always out of stock.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 October 2025SeasideRose49
Verified Purchase

Good value for money.

I have been buying these thermal tops for a number of years now as they are cosy but not bulky. They seem to be tighter this year so I bought a size up from my usual.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

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