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M&S

Heatgen™ Medium Thermal Leggings

£18

Colour

Customers say:

Fits true to size()
Size

Free standard delivery over £60

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.

Details & care

Item details

Model Height: 5ft8"/172cm

Model is wearing size: 12

Style

Added Stretch

Features

Heatgen™ technology

lightweight and supersoft, designed to keep you warm when the weather gets chilly

Composition

55% acrylic, 39% viscose and 6% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

Do not dry clean

Delivery, collection & returns

Christmas delivery and collection last-order dates

Standard Delivery

Order by Saturday 20th of December

Nominated Day Delivery

Order by Tuesday 23rd of December

Store Collection

Order by Tuesday 23rd of December

Delivery

Standard

UK Standard Delivery is available for £3.99 or free on orders over £60 (excluding furniture).

Nominated Day

UK Next Day Delivery and UK Nominated Day Delivery (excluding Northern Ireland) are available for £5.99 (excluding furniture)

Collection

Collect from store

Store collection is free on all fashion, home and beauty orders.

Returns

UK returns

Free

Exclusions apply

Full delivery and collection informationOur returns policy

Reviews (76)

4.7

80% Recommended this product

Mentions
12 December 2025cozzy
Verified Purchase

Amazing fit

Yes, I recommend this

Great quality, and the fit is spot on. Great value and they look a treat on. Fast deliver and as always, packed well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 December 2025Bethan1809
Verified Purchase

Not for shorties!

Yes, I recommend this

I bought these as I have joined a walking group but unfortunately they are made for much longer legs than mine at 5’2”. However, unfortunately I got rid of the packaging- bin day- so I gave them to my daughter-in-law. She is a few inches taller and absolutely loves them.

Helpful?

01 December 2025Wilmacarstar
Verified Purchase

You need these!

Yes, I recommend this

Bought a couple of pairs again this year because I lived in them last winter. Soft, stretchy and warm, but not bulky. I love stirrups and have them put on lots of leggings because they stay put under long boots. If you wear Regular length, you're in luck, but I'd love to buy short/long for family and friends. Different colours would be a bonus too!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 December 2025A Atter
Verified Purchase

Fit well, not sure they'll last long

No, I don't recommend this

The fit and feel of these leggings is lovely, I have washed them once and they seem to have lost some elasticity and general 'fluffy' feeling already. They have also bobbled already despite only being worn and washed once.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 November 2025Sportscar
Verified Purchase

STYLISH LEGGINGS

Yes, I recommend this

I love these leggings. They sit perfectly inside ankle boots. Size is just right and the length too. 12 Regular. Very warm and comfy. Would recommend these leggings.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 November 2025Busymumtoteenagers
Verified Purchase

Great!

Yes, I recommend this

Warm and cosy! They did become a bit bobbly but that wasn’t a problem.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

23 November 2025Syl01
Verified Purchase

Warm and comfortable

Yes, I recommend this

Lovely warm leggings, very soft and comfortable. I bought 2 pairs to see me through the winter months. Worn them under my trousers and they were very comfy and warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

23 November 2025Green51
Verified Purchase

Warm & cosy

Yes, I recommend this

Very pleased with these leggings, I was hoping they’d be thicker but after wearing them I’m very impressed. So warm, cosy and very comfortable.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

19 November 2025moomintroll
Verified Purchase

Excellent value

Yes, I recommend this

Can’t be without my M&S thermals leggings so warm and comfy to wear. Easy wash dry fast.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 November 2025mommak
Verified Purchase

Medium thermal leggings

Originally posted on marksandspencer.ie

Yes, I recommend this

These are absolutely super. They feel lightweight & very soft. I'm delighted with them.

Helpful?

12 November 2025Wsuzy
Verified Purchase

Fab

Yes, I recommend this

These fit well, are warm and soft, wash well and I love the strap under the foot that stops them riding up.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 November 2025Misters mum
Verified Purchase

Great quality

Yes, I recommend this

Very comfortable and well fitting . They wash particularly well keeping their shape . Thermal quality is good

Helpful?

09 November 2025gkminthesky
Verified Purchase

Don't ride up

Yes, I recommend this

Thought i would try these with the foot stirrups. Fitted well and didnt ride up. I wanted them for wearing under another pair of trousers but I'm sure some people will wear them on their own

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 October 2025Smx17
Verified Purchase

Great!

Yes, I recommend this

Just what I have been looking for. Soft and comfortable, perfect for additional warmth on winter walks.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 October 2025barbicanbird
Verified Purchase

Nice, but thicker than needed to be

No, I don't recommend this

They fit well, but are thicker than my usual leggings at Uniqulo. So not so good under trousers' The stirrup at the foot is very useful though.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 October 202531Annie121
Verified Purchase

Cosy and warm

Yes, I recommend this

The stirrups prevent them from riding up the leg, and they are very comfy

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 October 2025Lan87
Verified Purchase

Comfy leggings

Yes, I recommend this

Soft and comfy bought size 12 which I am and fit perfectly. The reviews said they came up small so ordered a 10 but were too small. I found them true to size.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 October 2025deni71
Verified Purchase

Excellent

Yes, I recommend this

Lovely quality. Beautifully soft fabric. Very comfortable. So good I ordered another pair.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 October 2025Redshanks
Verified Purchase

Thin Thermal leggings

No, I don't recommend this

These leggings are a good fit and hopefully the stirrups will keep them firmly in place. I was hoping to wear them on their own with a top or tunic in cooler weather. However, the fabric seems thinner than the medium thermal leggings I bought last year so I fear that I won't be able to wear them as planned, as I think that they will be a bit 'see through'. Also they won't be as warm as my older pair. All isn't lost as I will wear them under jeans in much colder weather, so I decided to keep them for that reason. I would like to see the thicker heavier weight thermal leggings made with stirrups as that option isn't currently available. Why not M&S?

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 September 2025Bennstour
Verified Purchase

Lightweight but snuggly

Yes, I recommend this

Wasn’t quite sure how comfy these would be with the stirrups but they are absolutely perfect. Would love more in other colours.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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