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2 Pack Heatgen™ Thermal Leggings

Product code: T329233

About this style

Sold as a pack of two, these thermal leggings from M&S use Heatgen™ technology to bring a light warmth rating on cooler days. Added stretch in the fabric gives a comfortable, flexible fit that moves easily with the body. They're an easy layer under trousers or dresses.

M&S

2 Pack Heatgen™ Thermal Leggings

£25

Colour

Customers say:

Fits true to size()
Waist

Free standard delivery over £75, otherwise from £3.99

Reviews (8)

4.3

50% Recommended this product

28 October 2026Dragon65
Verified Purchase

Delighted!

Yes, I recommend this

Did the job perfectly! I didn’t understand how warm such light leggings would be. They also got really well under all jeans and trousers.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 October 2026Julesea
Verified Purchase

Great light warm leggings

Originally posted on marksandspencer.ie

Always very happy with these handy, warm yet light, no bulky leggings, great even for sleeping. Can recommend

Helpful?

25 October 2026Lindits
Verified Purchase

Comfy, warm and don't slide down

I bought these for an Arctic cruise and they were great under my flared jeans. Comfy, didn't slide down and haven't become baggy at the knees.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 October 2026AnneKG
Verified Purchase

Cosy leggings

Yes, I recommend this

Bought these last year and loved them. Great for under jeans or trousers. Keep you nice and warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

22 October 2026Dedicatedfollower66
Verified Purchase

Great!

Yes, I recommend this

Great, comfy under jeans and that extra bit of warmth

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

19 October 2026sweetie124
Verified Purchase

Okay

These are nice but only if it’s semi cold as they are quite thin. They are also extremely tight - I am a size 6 waist and the size small feels so tight!

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

15 October 2026Plc84
Verified Purchase

Warm and comfy

Yes, I recommend this

True to size, very comfortable and warm. Really good!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 October 2026Weaktea
Verified Purchase

Very thin

No, I don't recommend this

Very poor. They are described on the website as leggings but they are just like tights and you can see your underwear through them. Not sure how they would keep you warm! Very expensive too.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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