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Heatgen™ Medium Thermal Long Sleeve Tops

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.

M&S

Heatgen™ Medium Thermal Long Sleeve Tops

£20

Colour

Size

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

Reviews (1098)

4.7

71% Recommended this product

Mentions
26 February 2026Junglebunny25
Verified Purchase

Excellent thermal

Yes, I recommend this

Great quality thermal. Very warm when it is really cold outside. Fits really well. Great price and good service .

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

26 February 2026Bettysweaty
Verified Purchase

Soft and comfy

Yes, I recommend this

mens thermal T, for a woman, nice length, much prefer to woman’s version which feels too short for longer body. Beautiful soft wash up nicely.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

18 February 2026Phil 68
Verified Purchase

A big medium

Yes, I recommend this

HAVE BOUGHT 2 PREVIOUS, THIS ONE IS RATHER SLOPPY.

Helpful?

14 February 2026SheCanDance
Verified Purchase

Very good quality

Love long body and really warm. I choose to wear men’s tops for winter because as a tall woman I often find ladies tops a bit short.

Helpful?

14 February 2026Marion4
Verified Purchase

Heatgen Thermals

Yes, I recommend this

My husband feels the cold a lot since he has got older and these thermals have meant he can still potter around in his shed. They fit him a treat and the main thing is they keep him warm

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

10 February 2026Ronossie
Verified Purchase

Warm as toast

Yes, I recommend this

Lovely and warm nice feel not itchy like some thermal wear! Found the fit came up large for the size as base layer clothing needs to be reasonably tight to enable layering! Well made good price but if the fit was better would have given 5 star review!

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

09 February 2026Susanj1951
Verified Purchase

Thermal long sleeve vest

Yes, I recommend this

Lovely vest, warm and cosy. Excellent quality and good value for money quick delivery

Helpful?

07 February 2026Ddddh
Verified Purchase

Good quality and perfect for sleeping in

Yes, I recommend this

Great for sleeping in bed. Provides just the right amount of warmth and is made out of very comfortable material.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

06 February 2026Clay03
Verified Purchase

Keeping warm on a very cold day.

Brilliant for keeping warm in really cold weather.

Helpful?

05 February 2026Amelia62
Verified Purchase

Nice and warm

Yes, I recommend this

Great thermal vest for warmth without bulk. Great as a PJ top too

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 February 2026Tom at desertwinds
Verified Purchase

Exceptional.

Yes, I recommend this

Superb texture, feel, softness and warmth. There's something very clever about that material. Claims to just be cotton but it dried quicker than my cottom vests after washing.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 February 2026Netty77
Verified Purchase

Over sized.

I ordered a size large it was more like an extra large.

Helpful?

31 January 2026BB1695
Verified Purchase

Warm

Yes, I recommend this

Outstanding warm and very comfortable I got a medium size I’m 42 chest and it fits perfectly

Helpful?

30 January 2026MistyMisty
Verified Purchase

Cosy

Yes, I recommend this

My husband loves these. He wears them under shirts and sweatshirts.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

29 January 2026Steve from Cheshire
Verified Purchase

Great quality!

Yes, I recommend this

Nice item - soft & warm and easy to wear under a jumper or hoodie

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

28 January 2026South East buyer
Verified Purchase

Great layer

Yes, I recommend this

Really pleased with this for work. Not excessively hot so ideal for keeping warm while working. Washes well, good quality

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

27 January 2026ShopperMark59
Verified Purchase

Does what it says it will

Yes, I recommend this

Bought for general use. Definitely keeps you warmer and is very comfy to wear. Works for overnight too. Easy to clean. Very happy.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

27 January 2026Deeeeeeeeessed
Verified Purchase

Nice and warm

Yes, I recommend this

Good product purchased before. When washed they do keep their colour.

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

26 January 2026AshleyP
Verified Purchase

Winter warmth

Yes, I recommend this

Warm and comfortable, essential wear for the depths of winter. Soft material, wears easily under a shirt or fleece without bunching. Neck could have been a bit higher for my preference.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

25 January 2026Hafzy
Verified Purchase

Warm base layer

Yes, I recommend this

Warm and comfortable and a great fit. Ideal for winter

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

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