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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

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 (63)

4.7

78% Recommended this product

Mentions
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

07 March 2025Morag T
Verified Purchase

Great Idea

Yes, I recommend this

Love these leggings. They’re great for wearing with boots as the underfoot strap keeps the leggings nice and straight on the legs. Great idea M&S as they take me back to my youth.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

31 January 2025Trisha Swarb
Verified Purchase

Warm tights

Good quality. The tights are well made Compared with other i will buy more.

Helpful?

26 January 2025summernights
Verified Purchase

Good all-rounder

Yes, I recommend this

Quite handy leggings, stirrups make sure they don't ride up, wearing for walking as good with waterproof over trousers if necessary or reasonable warmth if worn alone. Size down for closer fit, also handy for outside work at home.

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

Comfort

Good

Warmth

A little warmth

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Average

Comfort

Good

Warmth

A little warmth

How did it fit?

A bit large

23 January 2025Hannah22
Verified Purchase

Heatgen Leggings

Yes, I recommend this

I am so happy with these leggings. They are not too thin or too thick and are lovely and soft. The straps are great - I wear these under jeans/trousers and they don’t ride up. They are quite roomy. I will get another pair but will go down a size. Definitely worth the price.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

A bit large

21 January 2025Pupperson
Verified Purchase

Nice fit and style

Yes, I recommend this

Like the style and fit of these especially the foot strap, but after only one wearing the material at the top of the leg is starting to “bobble”, but I suppose at this price I was expecting too much. The material is thinner than other leggings but seem to be warm.

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

20 January 2025ToastyMax
Verified Purchase

Great quality

Yes, I recommend this

Lovely thermal leggings, not quite as warm as I had hoped though. Also had to change for a smaller size, so slightly towards the larger fitting I would say, but great length. I am 5’4” and the length is great on me.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

A bit large

20 January 2025wheeler123
Verified Purchase

Impressive lightweight thermals

Yes, I recommend this

Impressive lightweight thermals. I wore them under jeans to watch a football match on a freezing cold day and they kept me warm. They seem to be true to size, maybe with a little room to spare.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

A bit large

19 January 2025Pinkdragonfly
Verified Purchase

Love them

Yes, I recommend this

Bought to wear around the house on cooler days. Love the under foot straps which help keep them in place and not twist. Lovely brushed, soft cotton and lovely and warm. They did lose a bit of thickness in the wash but still great leggings.

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

A bit small

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

A bit small

18 January 2025Hano57
Verified Purchase

Excellent Quality

Yes, I recommend this

Very good quality and fits nicely I recommend this leggings for the gym or for running ⭐️⭐️⭐️⭐️⭐️

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How did it fit?

True to size

18 January 2025AndieM
Verified Purchase

Super soft and super warm

Yes, I recommend this

Incredibly warm and soft. Can’t believe how warm they are when they seem so thin. Stirrups are great. They do fit big. I sized down to a 10.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How did it fit?

Large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How did it fit?

Large

10 January 2025Mrs Kingswells
Verified Purchase

Good and not so good 😊

Yes, I recommend this

The fabric has a lovely feel and the fit is great but I was disappointed in the thinness of the fabric, also wasn’t keen with the sheen on them. However with a pair of black opaque tights underneath it helps and they then look better.

Reviewer Ratings

Quality

Average

Value for Money

Average

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Average

Value for Money

Average

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How did it fit?

True to size

04 January 2025Aslanyurekli
Verified Purchase

Good design

Yes, I recommend this

I'm 169cm, 62kg. I bought the L size. I'm very pleased. The design is great. I don't like leggings. This is very comfortable. And my ankles don't get cold.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

True to size

01 January 2025KEC5
Verified Purchase

New leggings

Yes, I recommend this

These are great to wear under trousers or jeans. Great fit.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How did it fit?

True to size

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