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Heatgen™ Medium Thermal Leggings

Product code: T327300B

About this style

These thermal leggings provide a cosy base layer to keep you warm on chilly days. Their Heatgen™ technology combines effective insulation with a soft, lightweight material that feels good on your skin. Added stretch ensures easy movement, while stirrups at the bottom hold everything in place. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

Heatgen™ Medium Thermal Leggings

€23

Colour

Size

Free standard delivery over €75, otherwise €4.50

Reviews (96)

4.7

81% Recommended this product

Mentions
06 November 2026Su Bu

No more cold ankles, no sliding out of my boots

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great idea to bring the stirrups back, stops the leggings sliding up my leg and out of my boots, no cold ankles. Feel nice and soft, easy to wear, I’m ready for the cold weather now.

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 20261234 Karen

Heatgen leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Slightly thinner fabric than I was expecting although they are still warm

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 October 2026Kjh2026

Nice and cosy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

So comfy and love the stirrups! Wearing regularly during these colder months

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 October 2026Miss Nice Lady

More colours please

Originally posted on marksandspencer.com (UK)

Ideal for wearing at home with longline jumper or if really code under a pair of wide leg trouusers

Helpful?

28 October 2026aethelfleda

Almost right.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

wars and fitted except the straps a bit long, However they can be hitched up to fit 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

25 October 2026Lindits

Warm and comfy

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Extra layer of warmth, stirrup fit meant no bagginess and fitted a treat. Higher waisted

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 October 2026FSagan

Heatgen stirrup leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Pleased with these, so bought 2 more pairs. True to size 12, the stirrups give them a flattering shape, very good quality material, comfortable and warm enough for Autumn - if I do need more warmth in the depths of winter, I’ll wear over thermal tights.

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

20 April 2026ChanMar

Perfect

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Stylish and warm exactly what I’ve been looking for

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 March 2026Rockcakes

Great Quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

After trying various other make of leggings without success l tried these. Very comfortable, fit well and keep their shape well even when worn all day, twice. Just about to wash them so will see what happens after. Not cheap but worth the money as warm and soft.

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 2026Capybara24

Warm enough for Iceland!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I bought these to go under waterproof trousers for a holiday in Iceland in winter. They were super comfortable and kept me toastie warm.

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

02 March 2026chance1

Great quality and price

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

They are superb quality and an affordable price. Well worth buying

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

11 February 2026Three times a lady

Great fit

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love these leggings, keep their shape after washing and comfortable to wear.

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 February 2026MonWad

Great product

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great quality as always, just what I needed. Will last well and keep me warm in the colder months, 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

01 February 2026terreros

Warm

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

They are warm but the stirrup is too long, the fit is fine

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

25 January 2026DViv

Nice product

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Stirrups are helpful. Stop leggings riding up during use

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 January 2026F McD

Poor Quality

Originally posted on marksandspencer.com (UK)

Very thin material even although they were meant to be brushed cotton on the inside for thermal warmth. Also they were far too long on the legs.

Reviewer Ratings

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

How do you feel about the size?

Very large

23 January 2026AngieH123

FANTASTIC THERMAL LEGGINGS

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very warm and comfortable thermal leggings. The stirrups make it much easier to layer them under trousers. I'm a size 12 and they are a perfect fit for me. They wash well and dry fast. They seem to be very good quality. I will buy some more. I wish they made socks in the same fabric.

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

04 January 2026RedMushroom26

Warm and comfy

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Great for dog walking or shopping, can be dressed up or down

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 December 2025Jill154

Perfect

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Just love these, sooo comfy and warm, perfect fit wash great

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

21 December 2025Oui 1

Like the stirrup

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Happy with the medium thermal but would buy another pair if they did thicker ones.

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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