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2pk Heatgen™ Thermal Leggings

Product code: T327202

About this style

These thermal leggings from our M&S Collection feature innovative Heatgen™ technology for light warmth without bulk, helping to insulate your body naturally. The fabric offers a beautifully soft and stretchy feel against the skin, while the lightweight design makes them perfect for layering. This convenient pack of two provides everyday warmth with a comfortable fit that moves with you. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

2pk Heatgen™ Thermal Leggings

€33

Colour

Waist

Matching items: Tops and Thermal Short Sleeve Tops
Free standard delivery over €75

Reviews (1118)

4.2

57% Recommended this product

Mentions
17 March 2026Sofia 55

Good quality and very comfortable.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought this item for cold winter days to wear under my jeans. Tried it on, is thin enough and warm enough. It fits well. It’s perfect

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

16 March 2026RedPhoenix

Excellent thermal leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I often feel the cold, and these have made such a difference. I wear them under my trousers, and find them comfortable and really help to keep me warm. Highly recommended!

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

16 March 2026SooziQoozi

Warm leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These legging are fine enough to fit under my trousers for an added layer of warmth.

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

15 March 2026DI100

Nice

Originally posted on marksandspencer.com (UK)

Would have been five stars but they are a bit too fine.

Reviewer Ratings

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit small

15 March 2026

Warm and soft

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very nice warm and soft leggings, highly recommended n good quality

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

13 March 2026Suesm45

Great quality!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Really good product, but why aren't they produced in different lengths? I have to turn up the bottoms. Trousers come in different lengths so why are these produced in only one length.

Reviewer Ratings

How do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

12 March 2026May Edgware

Cosy leggings.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I thought the leggings would be fleece lined, but they are not. However, they are warm and fit well and because they are not bulky, I plan on wearing them under jeans/joggers on freezing days next winter.

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

12 March 2026Italian1234

Great quality good delivery!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Purchased for a dear friend in Zambia! Great delivery and packed well!

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

10 March 2026MaryBeeBee

Top quality leggings that last and last.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Extremely comfortable leggings, both lightweight and warm, and not bulky under trousers. I've bought these in previous years so know they wear well. These are the perfect dark navy blue.

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

10 March 2026ALANG50

Great as an Extra Layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These are nice and thin and even fit well under leggings. The extra layer of warmth helps under other trousers however I wouldn’t wear them without another layer on top as they are a little more like tights than leggings. Lovely and soft too.

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

09 March 2026Juliebe

Could be thicker not so see through

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Fit good but would have liked them to be a bit thicker very see through.

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

09 March 2026Suse60

Excellent thermals

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great product and so comfy to wear. Warm but not bulky so easily worn under things. They wash well too.

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

06 March 2026BeauKay

Warm, Lightweight and Perfect for Winter Trips

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

They’re really lightweight but surprisingly warm, making them great to wear underneath jeans on colder days. I also wore them on their own for relaxing and they were super comfortable. They kept me warm without feeling bulky, so they were ideal for travelling and layering.

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

06 March 2026Shile

Heatgen thermal leggings

Originally posted on marksandspencer.com (UK)

Comfortable and light weight. Sufficient to keep legs warm.

Helpful?

03 March 2026TorJ

Thin material

Originally posted on marksandspencer.com (UK)

They do what they are supposed to do but the material is thin. No idea how they are supposed to be thermal when you can nearly see through them.

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

01 March 2026Mcmartinee

Thin

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

I was very disappointed with the quality I couldn’t return them as I had torn the wrapping

Helpful?

27 February 2026Watercolours

Perfect!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Comfy, warm, easy to wash and dries quickly. Sizing is accurate too.

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

26 February 2026LucyMain

Great value leggings, fits true to size

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great for under dresses/skirt or under trousers when it's very cold. They are thin, but I prefer this as they are quite warm as they are. I am 5'3, and they go down to the bottom of my ankles, but are not unmanageably long.

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

26 February 2026Jess9

Good fit

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Good fit feel nice and good quality would recommend

Reviewer Ratings

How do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

25 February 2026AdrienneMorgan

Lightweight warm and effective. Highly recommend.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I was surprised by how thin and lightweight the leggings were!! Not what I was expecting at all. But, worn underneath another “ordinary” pair of leggings, they were surprisingly comfortable and very effective at keeping me warm during our recent cold snap. So a great success and I highly recommend.

Reviewer Ratings

How do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

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