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Heatgen™ Medium Thermal Leggings

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

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 (86)

4.7

80% Recommended this product

Mentions
02 March 2026chance1
Verified Purchase

Great quality and price

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 February 2026Three times a lady
Verified Purchase

Great fit

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 February 2026MonWad
Verified Purchase

Great product

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 February 2026terreros
Verified Purchase

Warm

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 January 2026DViv
Verified Purchase

Nice product

Yes, I recommend this

Stirrups are helpful. Stop leggings riding up during use

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 January 2026F McD
Verified Purchase

Poor Quality

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 did it fit?

Very large

Helpful?

Reviewer Ratings

How did it fit?

Very large

23 January 2026AngieH123
Verified Purchase

FANTASTIC THERMAL LEGGINGS

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 January 2026RedMushroom26
Verified Purchase

Warm and comfy

No, I don't recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 December 2025Jill154
Verified Purchase

Perfect

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

21 December 2025Oui 1
Verified Purchase

Like the stirrup

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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?

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