Update your browser for a better shopping experience!

Get faster load times, stronger security and access to all features.

Heatgen™ Maximum Thermal Long Sleeve Top

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.

M&S

Heatgen™ Maximum Thermal Long Sleeve Top

£28

Colour

Size

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

Reviews (990)

4.8

72% Recommended this product

Mentions
05 March 2026jellybeanjuice
Verified Purchase

never changed the design in years

Underwhelmed not very appealing to the younger generation

Helpful?

04 March 2026Eliza44
Verified Purchase

Super warm thermal

Yes, I recommend this

Bought this for my son who works on an oil rig in Scotland, in freezing conditions. According to him he described the top as worth its weight in gold!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 March 2026Joe290
Verified Purchase

Go thermal

Yes, I recommend this

Delighted with these latest thermal tops. I have worn M&S thermals for many years and believe these are the best. Very warm, comfortable and good value, they have laundered well.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 March 2026Brysharth
Verified Purchase

Happy repeat customer

Yes, I recommend this

Not the first time purchased and no surprises. Solid item each time

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

28 February 2026Confusedattheability
Verified Purchase

Great qualitt

Great layer. Really long so covers your butt, no riding up and definitely winter warm. A little expensive but for me worth it.

Helpful?

28 February 2026SusieMul
Verified Purchase

Very good thermal vest

Yes, I recommend this

Great quality and very warm. Soft and comfortable, sizing accurate.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

25 February 2026Brabie
Verified Purchase

Keeps my husband nice and warm.

Yes, I recommend this

My husband really likes this thermal long sleeved top as it has kept him nice and warm. Easy to wash.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

23 February 2026Mandsupershop
Verified Purchase

Men’s Thermaltop

Yes, I recommend this

An excellent addition to any wardrobe in the cooler months and I suppose the only layer you really need. Super soft, washes really well and like new every time

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 February 2026long sleeve
Verified Purchase

Heatgen™ Maximum Thermal Long Sleeve Top

They are great at keeping warm especially in the cold weather

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

19 February 2026Nicolita21
Verified Purchase

Lovely thermal top for skiing

Yes, I recommend this

Bought for skiing. The black looked very smart. Very soft and great quality for the price. Would definitely buy again

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

18 February 2026ShebaDog7
Verified Purchase

Very good indeed

I bought it for my husband who feels the cold , & he hasn’t moaned since !

Helpful?

18 February 2026Stevo33
Verified Purchase

Good quality

Yes, I recommend this

I have previously bought the short sleeved and would recommend for warmth and feel

Helpful?

17 February 2026Clive Phillips
Verified Purchase

Thank you always is perfect for bad weather Clive

Yes, I recommend this

Perfect for extremely cold and freezing temperatures and cold weather usually buy every year if needs be.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

16 February 2026Rol77
Verified Purchase

Very warm, good fit, fast delivery.

Yes, I recommend this

Arrived quickly, fitted me perfectly and very comfortable and warm on

Helpful?

14 February 2026sltofdevon
Verified Purchase

Great vests.

Yes, I recommend this

This is the second time we’ve purchased these vests. My husband feels the cold and finds them very comfortable and warm.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

11 February 2026Kammie
Verified Purchase

Warm and cosy top

Yes, I recommend this

I bought the ladies version of these and the matching leggings for wearing under my walking clothes and coat when walking the dog. I loved them that much I bought my husband this one and he loves them too.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 February 2026Newshoehappy
Verified Purchase

Good quality warm vests

Yes, I recommend this

My husband loves these vests when he is playing golf, they keep him warm and still look smart under his golf tops.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 February 2026Ali0
Verified Purchase

Perfect

Yes, I recommend this

Top marks from my dad who feels the cold a lot. It’s super soft as well as warm on these cold winter days. He likes it so much, I’m going to get him some more.

Helpful?

08 February 2026Proud and welsh
Verified Purchase

Good

Yes, I recommend this

I bought one like this a few years ago for my husband, the new one even though it's comfortable and soft, it's not quite as thick as the original.

Helpful?

07 February 2026niggly
Verified Purchase

Excellent thermal top

Yes, I recommend this

Great top. Fits well, very warm and comfortable. Hand washed so far and no shrinkage.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

1 of 165