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M&S Collection

Heatgen™ Maximum Thermal Long Johns

£28

Colour

Customers say:

Fits true to size()
Size

Customers say:

Fits true to size()
Also available in: Long Johns and Vest

Product code: T147412W

About this style

When the temperature drops, beat the chill in our thermal long johns. Regular fit with an elasticated waist and cuffed bottoms for snug and secure wear. Functional keyhole fly opening. Our clever Heatgen™ technology uses an innovative fibre blend, helping your body to generate and retain heat so you can stay warm when the weather gets chilly. Brushback texture feels gentle against your skin, while supersoft seams ensure there's no chafing.

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

Free

Nominated Day

£5.99. Order by 7pm for delivery tomorrow

Collection

Collect from store

Order before 9pm for free next-day in-store collection

Returns

UK returns

Free

Exclusions apply

Full delivery and collection informationOur returns policy

Reviews (594)

4.7

73% Recommended this product

Mentions
13 April 2025Johnenigma
Verified Purchase

Thermals

Yes, I recommend this

Look and feel very good. Much thicker than other M&S thermals I have. Bought ready for next winter, so not worn them yet.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

08 April 2025Oluyemi
Verified Purchase

Very good material

Yes, I recommend this

The material is quality and very good not hitching. I love it.

Reviewer Ratings

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

07 April 2025Paddlin
Verified Purchase

Very good product.

Yes, I recommend this

Very good product. My husband feels the cold terribly and these are just the job for keeping his legs warm.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

02 April 2025JCH59
Verified Purchase

Great quality

Yes, I recommend this

Great thermals I use them often especially on my bike

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

13 March 2025SamSteve
Verified Purchase

Amazing Long Johns

Yes, I recommend this

Brilliant warm long johns. Partner a builder and they kept him warm under his work jeans

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

12 March 2025MrsJAC
Verified Purchase

Excellent value and warmth

Yes, I recommend this

Everyone who I bought these for was really pleased!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

12 March 2025Alison Scotland
Verified Purchase

Very warm

Yes, I recommend this

Bought for my husband who is a diver and le loves them

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Fair

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Fair

How did it fit?

True to size

05 March 2025VivGen
Verified Purchase

Very good

Yes, I recommend this

Used them for years and very warm. Highly recommended

Helpful?

05 March 2025Cutting Edge
Verified Purchase

Not the warmest thermal

No, I don't recommend this

For a wool mixed maximum thermal wear it’s certainly not as warm as you’d expect it to be. Using it during the cold weather you can still very much feel the freezing cold. Unfortunately the item took over 2 weeks to be delivered which is quite disappointing.

Reviewer Ratings

Quality

Fair

Value for Money

Poor

Style

Good

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Fair

Value for Money

Poor

Style

Good

How did it fit?

A bit large

01 March 2025Jax32
Verified Purchase

Impressive

Yes, I recommend this

Very impressed with the thickness of the material and stitching at present,can't comment on the durability at this moment in time, as my son has only had them for two weeks,but they do wash up lovely, although these are tumble dryer safe, i prefer to dry these with my jumpers on a heated clothes dryer.I think tumbledrying does shrink certain materials even if the label says its safe to do so, anyway they dry really quickly (overnight),and its a much cheaper way of drying. My son is a landscape Gardner so time will tell on the durability, but I have great hopes. They are the best thermals I have brought to date,and i have brought many over the years, for my husband who was a roofer,so needed something to keep him warm in winter. These come in different thicknesses, the ones i have are maximum, they come in medium and light weight too, for people who maybe don't feel the cold as much,or cater for the months like Autumn and spring where we are approaching the colder months or coming out of the colder months. I think the price is quite reasonable,especially if they wear well,last, and don't come unstitched like other thermals i brought in the past,which weren't much cheaper and a total waste of money. As the saying goes and is normally true. 'You get what you pay for' I brought two sets,two long sleeved tops, as well as the leggings,the tops come in short sleeves as well,but my son wanted long. I just want to emphasise, which was very important to my son as he's bent over in the cold a lot if the time, the tops come up lovely and long, he said plenty of material to tuck in,so he's not constantly having to stop work to redress himself like other thermals he's had... The fit is true to size,they are not baggy like some thermals, snug,but not tight.my son is 5"6" average build. So a size small. I brought the black colour and they look very stylish on,if you can can say that about thermals(longjohns).nothing like the haunting images i still have as child,seeing my Grandad in his. Those we're the days,we have come a long way.....

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

27 February 2025Nick02
Verified Purchase

Must have !

Originally posted on marksandspencer.ie

Yes, I recommend this

Pretty warm and soft. It is exactly what I was looking for.

Helpful?

24 February 2025Dusty Binns
Verified Purchase

Last time

No, I don't recommend this

The product is very good however it will be the last item I purchase from yourselves while you continue to advertise on GB News … a sad day

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Poor

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Poor

21 February 2025JustJoe90
Verified Purchase

Nordic quality

Yes, I recommend this

I recently took a trip to Finland where temperatures were below -9* and these were perfect. They were comfortable to wear underneath my trousers and were super warm, I didn’t feel the cold once! Definitely good value for money

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

20 February 2025IsbisW
Verified Purchase

Thermal Long Johns

Yes, I recommend this

They fit well and provide warmth on a cold day. Just what I. Wanted

Helpful?

16 February 2025Chrisjump
Verified Purchase

Pleased with quality

Yes, I recommend this

Bought to keep extra warm watching the rugby with the chilly weather.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Excellent

How did it fit?

True to size

14 February 2025Air2Bob

Shrunk!

No, I don't recommend this

Nice product, reasonably warm although not as warm as I'd hoped. The main problem was washing. I washed the product once following the washing instructions on the label and both the trousers and the top shrunk! I think I'll probably end up returning for a refund which is a shame as I had high hopes.

Reviewer Ratings

Quality

Fair

Value for Money

Poor

Style

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Fair

Value for Money

Poor

Style

Good

How did it fit?

True to size

12 February 2025Anne Not H
Verified Purchase

Well finished and comfortable

Yes, I recommend this

Needed to retain body heat. Had to be washable and to be tumble dried.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How did it fit?

True to size

12 February 2025proudsalopian
Verified Purchase

Warm!

Yes, I recommend this

Ideal in this cold weather. Soft and comfortable to wear

Reviewer Ratings

Quality

Good

Value for Money

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

How did it fit?

True to size

11 February 2025Vicki2
Verified Purchase

Thank good for long johns especially Heat tech Max

They are doing what they say, keeping me warm under my trousers

Helpful?

07 February 2025sandshrew118
Verified Purchase

Super comfortable

Yes, I recommend this

Super warm and comfortable cotton, great for keeping warm in winter.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

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