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M&S Collection

Heatgen™ Medium Thermal Long Johns

€ 29

ColourGrey
Size

Also available in: Short Sleeve Thermal Top
Free standard delivery over €50

Product code: T148814N

About this style

Stay cosy with these cotton-blend thermal long johns. Regular fit, offering a medium level of warmth. Made from an insulating brushed-back cotton blend that's breathable for extra comfort. Finished with ultra-soft seams for snugness. 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.

Medium warmth for wrapping up in moderately cold conditions.

Details & care

Style

Regular fit

Button fastening

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

Delivery

Standard

FREE over €50, or €4.50

Collection

Collect from store

FREE

Returns

Ireland returns

FREE

Exclusions apply

Full delivery and collection informationOur returns policy

Reviews (542)

4.7

72% Recommended this product

Mentions
17 March 2025cornedbeef

Warm but not comfy

Originally posted on marksandspencer.com (UK)

Warm but has really big internal seams which mark the legs quite badly. I actually wore them inside out which was a lot more comfy

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

08 March 2025Fabrice576

Perfect balance between warmth and bulk

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Really like these long johns , perfect warmth to bulk ratio Particularly like the button opening as it allows wearing regular underwear too Very soft with no seams discomfort and washes well

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

07 March 2025L2D

Excellent quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Item has fitted my father perfect and not too thick. Keeps him nice and worm

Reviewer Ratings

Value for Money

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Value for Money

Excellent

How do you feel about the size?

True to size

07 March 2025GlensPen

Great, warm and good quality.

Originally posted on marksandspencer.com (UK)

Great, warm and good quality thermals. Ideal for winter.

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

04 March 2025SuzieSu

Super warm and wash well

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Super soft and warm. Make all the difference. Wash really well with no shrinkage.

Reviewer Ratings

Quality

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

How do you feel about the size?

True to size

28 February 2025Ceedub

Excellent thermal leggings.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Excellent thermal leggings for those cold days outside.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

24 February 2025Hillside Annie

So Comfortable - Warm, Soft, Lightweight...

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

My partner said he felt as thought he wasn't wearing any long johns because they are so soft, lightweight and comfortable. Like a second skin, and very warm.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

22 February 2025Dit2

Great quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Good quality, soft against the skin, they keep you nice and warm. As they should, wash well.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

20 February 2025Poppet19

Great quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I purchased 2 of the long sleeved tops last winter and added 2 more this winter, and decided to add a pair of these long johns to my collection, and wasn't disappointed, great quality and they do the job....

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

A bit small

19 February 2025Joy1947

Lovely and warm!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Just right for wearing under trousers on an electric bike.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

How do you feel about the size?

True to size

19 February 2025Marylu59

Fits well and warm as toast

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Fits well very comfortable nice and warm does what it’s meant to

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

How do you feel about the size?

True to size

16 February 2025VegieGal

A leg saver

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I purchased two pairs for a friend who works in an outside environment. His existing leggings would cause irritation so I suggested trying a cotton mix. So far so great. Also purchased a matching top to try.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

10 February 2025P50wxm

Medium Thermal Long Johns

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Really pleased with these, easy to order online and collect from local store

Helpful?

08 February 2025LBee55

Good quality fabric and fit.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought for outdoor activities during the winter. Good quality fabric and fit.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How do you feel about the size?

True to size

08 February 2025Sue E

Excellent

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought for my husband who is very pleased with them and has asked me to buy some more!

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How do you feel about the size?

True to size

07 February 2025sandshrew118

Warm and comfy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Warm and comfortable like the other similar products

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How do you feel about the size?

True to size

06 February 2025Lisbeth

Nice and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Husband says these are warm and comfortable, very pleased with them.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

06 February 2025Kayess

recommend

Originally posted on marksandspencer.com (UK)

Good fit and perfect for keeping warm and comfortable outside. Highly

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

05 February 2025K Slater

Great quality, good value

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Hubby’s favourite - wont be without them for working outside in the cold

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How do you feel about the size?

True to size

05 February 2025Denimsari

Well worth it

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and warm and wash really well. Very pleased.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How do you feel about the size?

True to size

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