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M&S

Heatgen™ Maximum Thermal Fleece Leggings

£22

Colour

Customers say:

Fits true to size()
Waist

Matching items: Thermal Top and Thermal Fleece Top
Free standard delivery over £60

Product code: T327303

About this style

These thermal leggings are lined with fleece for a super-cosy feel. They feature our Heatgen™ maximum warmth technology which effectively traps body heat to keep you warm and cosy. Plenty of added stretch means they move with you for a comfortable fit. M&S Collection: versatile styles in modern shapes with unique and playful details.

Details & care

Item details

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, 37% viscose and 8% 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 (955)

4.7

76% Recommended this product

Mentions
08 January 2026Neeva
Verified Purchase

Great quality lovely and warm, so comfy!

Yes, I recommend this

Great leggings.. true to size and so warm and comfy! I will definitely be purchasing more as these are absolutely the best legging I have ever had. Well done M&S

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 January 2026
Verified Purchase

Very soft and very warm

Yes, I recommend this

Bought specifically to wear in current cold weather. I had tried these HeatGen leggings a couple of years ago and have worn them frequently. I even use them at night when the temp drops substantially!

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

08 January 2026AMarriott
Verified Purchase

So comfortable to Wear

Yes, I recommend this

These are so comfortable and easy to wear, super soft and super to wash.

Reviewer Ratings

How did it fit?

Large

Helpful?

Reviewer Ratings

How did it fit?

Large

08 January 2026Joybells29
Verified Purchase

Perfect pairing with matching loungewear matching

Yes, I recommend this

Perfect colour match to go with matching top cozy feel

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 January 2026Skoobz37
Verified Purchase

Great quality leggings.

Yes, I recommend this

Bought recently with the matching top. Love the colour, so warm and cosy, great quality and perfect for the recent cold spell.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

08 January 2026Jenny FN
Verified Purchase

V impressed at how warm they are

Yes, I recommend this

So warm and cosy. Have literally lived in them this winter. Have a pair for day wear, and another pair for in bed ! Wash well and dry quickly

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 January 2026GRMK
Verified Purchase

Cosy

Yes, I recommend this

I love these leggings and now have 3 pairs. The only downside is they pick up fluff quite noticable.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 January 2026bubblychick7
Verified Purchase

Great Quality

Yes, I recommend this

These Thermal leggings are superb, very comfortable and fit true to size.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026Biddy Mac gee
Verified Purchase

Warm. Comfortable. But baggy legs as I need a 16

Yes, I recommend this

Love it that they are sooo warm. I buy large to give me a comfortable waist. But my legs are pretty slim and so the leggings wrinkle. I would like Large and Extra Large to have an option of slim / not al legs.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026Rjecc
Verified Purchase

Faulty

Product was faulty when taken out of packaging - had a pull and hole to knee.

Helpful?

07 January 2026Ominu
Verified Purchase

Comfort and Warmth

Yes, I recommend this

I've had these before and was delighted to see they were in stock. They're very warm, very reasonably priced and so comfortable.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026Samarkra
Verified Purchase

Brilliant, very warm

Yes, I recommend this

Great leggings, very warm. I’m only 5’3 and size 8 and don’t find them that long as others suggested. Sizing is quite generous which is fine and the waistband is quite thick so comfortable. Going to buy more now as my staple for winter

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

07 January 2026ZEEDA
Verified Purchase

AMAZINGLY WARM AND COMFORTABLE LEGGINGS

Yes, I recommend this

Absolutely thrilled with these super warm, soft and comfortable to wear HEATGEN MAXIMUM THERMAL LEGGINGS.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026Roozie
Verified Purchase

Cosy leggings.

Yes, I recommend this

Really warm and cosy, love that they come in a few colours. Little long in the leg for me as I have short legs but can always fold up. Great for after cold water swimming. Really nice, thick, quality material. I went a size down as they are pretty generous.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

07 January 2026Lhr93
Verified Purchase

Lovely and warm leggings

Yes, I recommend this

Really comfy and warm. Just what I was after. As they are fleecy on the outside too they will probably bobble but as I wear them out on the farm it doesn’t bother me.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026MBVM
Verified Purchase

Great leggings!

Yes, I recommend this

I have been searching high and low for comfy leggings with the right material and right length and these are 100% perfect. I wear them everywhere I go. Hope they stay as I will definitely order again once I've worn them out.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026Pinkpitstop
Verified Purchase

Excellent quality

Yes, I recommend this

Exactly as described,very warm.fits well washes well.Easily the best I have tried.good value.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026runjulie51
Verified Purchase

Lovely cosy top p

Yes, I recommend this

Lovely material very lightweight but very warm . I use as a base layer while pit walking and it wotkd very well keeps me toasty

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 January 2026VIWarshawski
Verified Purchase

Not long enough

I’m 5 foot 10 inches tall and these are about a foot too short for me

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

06 January 2026Janet McC
Verified Purchase

Great ,

Yes, I recommend this

Beautifully warm. Fit well. Size 10. A little long in the leg but I just turn them up. Have bought a second pair. Couldn’t get through a British winter without M and S heatgen thermals. J M.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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