Update your browser for a better shopping experience!

Get faster load times, stronger security and access to all features.

M&S

Heatgen™ Thermal Shaping Leggings

£18

Colour

Customers say:

Fits true to size()
Waist

Free standard delivery over £60

Product code: T327204

About this style

Feel supported and comfortable during colder months with these Heatgen™ thermal shaping leggings. The sculpting design gently complements your natural curves while the innovative Heatgen™ technology traps heat effectively without adding bulk. Made from soft, brushed fabric with a cosy feel against the skin, these M&S Collection leggings offer warmth and comfort with a flattering silhouette that moves with you throughout the day. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Item details

Model Height: 5ft10"/178cm

Model is wearing size: 12

Style

Non padded

Control: Light control

Non wired

Features

Heatgen™ technology

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

Composition

45% acrylic, 30% viscose, 19% polyamide 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 (10)

4.2

70% Recommended this product

Mentions
24 November 2025Leamore
Verified Purchase

Really recommend these.

Yes, I recommend this

Wear these with a thermal top for real warmth. I always size up because I like the extra length to tuck into socks. Really recommend.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 November 2025Olue
Verified Purchase

Loving this

Yes, I recommend this

I’m very pleased with these leggings. I like that they don’t show under fitted trousers, keep me warm AND smoothen my shape. I really like the wide waistband and the fact that it doesn’t dig into me. I bought these during an offer and really feel it was money well spent. Lovely product M&S, welldone.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 November 2025Starburst1
Verified Purchase

Thermal leggings

Nice fit and high waist but not particularly shaping or thermal. More like thick tights.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 October 2025Beth the Cook
Verified Purchase

Uncomfortable

No, I don't recommend this

These are for the figure conscious not comfort. very difficult to put on and uncomfortable to wear. feels like a straightjacket

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

19 October 2025Jillzzzz
Verified Purchase

Great fit.

Yes, I recommend this

I thought these might be tight, but they are fine. They stretch and fit in all the right places.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 March 2025fern16
Verified Purchase

Fabulous leggings

Yes, I recommend this

These are fabulous- nice soft comfy thick Waistband which doesn’t roll down - toasty warm

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

13 February 2025Andrea41
Verified Purchase

Super warm and comfy

Yes, I recommend this

Not only are they super soft but I have been wearing all week in Canada in minus temperatures and have never been warmer!

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

06 February 2025REN1110

Ok

Not as warm as I hoped. Fine under another pair of trousers, but too see through & not warm enough on their own

Reviewer Ratings

Quality

Average

Value for Money

Average

Style

Good

Comfort

Good

Warmth

Moderate warmth

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Average

Value for Money

Average

Style

Good

Comfort

Good

Warmth

Moderate warmth

How did it fit?

True to size

01 February 2025Liz135
Verified Purchase

Heatgen Bottoms

Yes, I recommend this

Heatgen bottoms very warm and comfortable. Have opted to wear with matching top as pyjamas. Nicely shaped and soft material.

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

23 November 202412Roses
Verified Purchase

Great Value Thermal Leggings

Yes, I recommend this

Very warm and soft great value leggings. I live in these in the winter great length and wash well.

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

1 of 2