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Heatgen™ Maximum Thermal Fleece Leggings

Product code: T327303

About this style

These thermal leggings offer maximum warmth with our innovative Heatgen™ technology that effectively traps body heat when temperatures drop. The soft fleece lining provides a luxuriously cosy feel against the skin, while the stretchy fabric ensures a comfortable fit that moves with you throughout the day. The clean, streamlined design makes these leggings perfect for layering or wearing alone during colder months. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

M&S

Heatgen™ Maximum Thermal Fleece Leggings

£22

Colour

Sale items

Customers say:

Fits true to size()
Waist

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

Reviews (1179)

4.7

78% Recommended this product

Mentions
13 March 2026
Verified Purchase

The best winter leggings yet!

Yes, I recommend this

So impressed with these leggings. Great price too. Quality outstanding and texture of material perfect for cold and windy weather as a base layer

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 March 2026borisdoris
Verified Purchase

Cosy Leggings for indoor and outdoor wear

Yes, I recommend this

Lovely and cosy for lounging or walking in have several pairs of these but have dropped a star because they seem to be different lengths.I order a short (I am 5ft 5") and they are a tad long. Wish you made them in different lengths. Apart from that almost perfect.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 March 2026EmmaJF69
Verified Purchase

Warm & comfortable

Yes, I recommend this

Very comfortable, warm and washes well. No shrinkage after washing

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 March 2026ariadne49
Verified Purchase

Very sort and good quality.

Yes, I recommend this

Lovely and soft. I have various leggings from M and S but none as soft and warm as these. I generally buy black but as these were in the sale decided to go with the lighter colour. It actually has made it easier to differentiate between my leggings although these will be in my suitcase for my trip to Norway in November.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 March 2026LoopyLou16
Verified Purchase

Go to winter walk leggings

Yes, I recommend this

My go to leggings for winter walks nice and thick and warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 March 2026Dip2253
Verified Purchase

Warm and great value.

Yes, I recommend this

Well made and comfy to wear. Very warm and keep out the cold.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 March 2026DianeCath58
Verified Purchase

Super warm and comfortable

Yes, I recommend this

These are by far the best thermal leggings I have ever purchased They are so cosy and warm!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 March 2026Jane968
Verified Purchase

Wonderful at -4

Yes, I recommend this

Bought for a trip to Norway. Was very comfortable against the skin and lovely and warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 March 2026sukisue2
Verified Purchase

Cosy

Yes, I recommend this

Soft cosy leggings slightly longer in the leg which helps keeps socks in place, I’ve several pairs now in different colours and plan to get more. For cat lovers out there mine love curling up on my lap when I’ve got them on

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

07 March 2026thesuburbanmummy
Verified Purchase

Warm but very polyester

No, I don't recommend this

Ok. Nice and warm. Smell of chemicals, bobble quickly.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 March 2026Polly500
Verified Purchase

Nice and warm

Yes, I recommend this

A shame that there is no choice in length. At 5ft 6 I find them a bit long but manage with leaving them bunched up at the ankles. Otherwise they are nice and warm and comfy. I haven’t washed them yet so can’t comment.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

06 March 202642Anon
Verified Purchase

Would recommend

Yes, I recommend this

These are nice quality, warm and wash well. This is my third pair. The only negative is that the ankle is quite wide, which is unnecessary since they stretch anyway.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 March 2026Nobbers
Verified Purchase

Warm & long legged

Yes, I recommend this

Very nice leggings. I bought these in black & brown. I didn’t give them full stars as they are very long in the legs and petite would have been better when you’re only 5ft 1. There wasn’t an option available. Overall they are warm and good quality.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 March 2026Dippers44
Verified Purchase

Good quality a little long

Yes, I recommend this

Lovely and warm but quite long. Thankfully they contain a good amount of elastane so they can be pulled up without going saggy. I’m 5’8” and found them a bit too long but kept them as all the others I tried were too short!

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

05 March 2026L_S_A_1
Verified Purchase

Super warm!

Yes, I recommend this

Great leggings to keep you warm in the winter months.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 March 2026Georgie01
Verified Purchase

Warm leggings

Yes, I recommend this

Warm and cosy. A little long for me at 5'3" but I can alter or turn the bottom of the legs up.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 March 20263retrievers
Verified Purchase

Basic winter necessities for daughter

Yes, I recommend this

Bought for daughter who suffers from Raynauds A staple of her winter clothing as warm reliable and comfortable

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 March 2026Advil
Verified Purchase

Warm and comfy

Yes, I recommend this

This is a great product. Our boiler broke down and it took a while to get it replaced so the house was cold. These kept me so warm I bought a second pair. Have recommended them to my daughter!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 March 2026SuzySooz
Verified Purchase

Warm leggings

Yes, I recommend this

Purchased these in brown, I've struggled to find brown leggings anywhere. I've not worn these yet so marked only 4☆. I have several of the M&S Thermal tops & love them so hope these will be just as warm. I'm a 12/14 & purchased these in 14. Like other reviews state the leggings are a bit long. I'm a 30 leg, but will turn these up when wearing boots or role them when wearing trainers. They may shrink a bit when washed, the tops do, at 40°

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 March 2026Haselnuss
Verified Purchase

Cosy, but not bulky

Yes, I recommend this

Bought these because they were on offer and such a lovely colour. They didn't disappoint when I got them home and tried them on. So cosy without being bulky.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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