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Heatgen™ Medium Thermal Brushed Leggings

Product code: T327300

About this style

Layer up against the winter cold with these Heatgen Plus™ thermal leggings. The Japanese Heatgen™ fabric features a brushed inner layer that traps warmth while keeping the design lightweight and flexible. A stretchy base ensures unrestricted movement, perfect for everyday wear during winter months. The beautifully soft material offers medium warmth without adding bulk under your outerwear. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

Heatgen™ Medium Thermal Brushed Leggings

€22

Colour

Out of stock online

Waist

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Free standard delivery over €75, otherwise €4.50

Reviews (1783)

4.6

71% Recommended this product

Mentions
03 November 2026AlabamaBrit

Great!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Have had pairs of these before. They are lovely and warm for the winter. Can be worn under outer layers or just as leggings. Very comfortable.

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

03 November 2026purelysimple0

Warm and soft

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and warm. Great for layering. Really soft material.

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

31 October 2026standardisation please

Happy with the quality.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I like the weight of the Heatgen Medium Thermal Brushed Leggings. However they are enormous and I had to buy a second pair as I had worn the first pair before realising just how much too big they are! I am a fairly standard size 10 so obviously that's the size I bought. The smallest size you sell is an 8 which is what I bought second time around. These are really still on the large size but in desperation I bought them. At one time I had size 6,8,10 and 12 in your trousers. It really is time you standardised your sizing between one manufacturer and another.

Reviewer Ratings

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

How do you feel about the size?

Very large

31 October 2026Pammck

Excellent quality and comfortable to wear

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Its simply amazing. I love the texture on my skin

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 October 2026Maxi 13

Lovely and warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice and warm thermal leggings really good fit and very comfortable

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

24 October 2026chicken365

A good buy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These leggings are a good fit, comfortable, warm and aren't wrinkly!

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

23 October 2026Sami13

Soft

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Beautiful very warm and soft great for any weather under skirt or dress so comfortable definitely would recommend my sister love it 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

15 October 2026Plc84

Lovely

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought as replacement for previous pair. Excellent quality and a good fit

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

08 October 2026Natalie Ann

Great quality and perfect item

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and soft and warm perfect for my mum with mobility issues as they don’t fall down to her ankles like trousers do

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

07 October 2026Poohbear8

Nice quality Leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice leggings, have purchased before, would like more colours. Good value, wash 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

07 October 2026Doe1

Thermal leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Absolutely brilliant leggings can’t see through them at all, you wouldn’t believe that they were thermal, only fault is that they don’t come in short lengths, so iv had to have them taken up, ordering another pair

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

03 October 2026miranda260

Perfect fit, good quality

Originally posted on marksandspencer.com (UK)

Fantastic Thermal leggings soft comfortable and great quality and price. I will be ordering some more in different colours.

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 October 2026lili99

Great

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Nice thermal leggings that aren’t too thick so will fit under my golf trousers in the winter. Haven’t needed to wear them yet but I’m sure the extra soft n cosy layer will feel good.

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 October 2026Ventnorian

Regular purchase

Originally posted on marksandspencer.com (UK)

Annual purchase and for me so much better than an heavy coat. This purchase was as the precious purchase; excellent.

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

30 September 2026Dawlishgal

Holiday warmth!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great thermal leggings , perfect for upcoming holiday to Norway , cosy, comfortable and warm under my jeans ! Fit like a glove !

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

29 September 2026Bighyapton

Great quality.

Originally posted on marksandspencer.com (UK)

I love these leggings . It’s the third year I’ve purchased them. They are warm and fit well.i wish they did them in other colours with the stirrups.

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

29 September 2026mammap

Not what I expected

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Disappointed - expected these to be leggings to wear as trousers but they are like thick tights in quality so not substantial enough - will keep to wear under hiking trousers

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

18 September 2026Gracehound

Cosy leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought the navy ones and very happy with the length and fit on the waist. Size 8. I am 5.8. I wear them under my jeans.

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

17 September 2026Cat black

Great purchase !

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Beautiful soft, warm leggings. Good value for money.

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

15 September 2026GeminiMama

Warm & cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

These are really warm and comfy. I wear them in the evenings snuggled up in front of the tellly.

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

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