Update your browser for a better shopping experience!

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

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

€29

Colour

Sale items

Waist

Matching items: Thermal Top and Thermal Fleece Top
Free standard delivery over €75

Reviews (1179)

4.7

78% Recommended this product

Mentions
15 March 2026Buzybee68

Comfortable and warm.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

The maximum thermal fleece leggings are really warm. Great under trousers. They are true to size and do stretch. I did buy another pair.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

15 March 2026Chetmet

Great

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Excellent thermals. I actually bought these for my fella. He has the mens maximum heat leggings and top but the ladies are so much better. So anyone with a husband or partner don't write these off. These are brilliant.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

13 March 2026

The best winter leggings yet!

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

13 March 2026borisdoris

Cosy Leggings for indoor and outdoor wear

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

12 March 2026EmmaJF69

Warm & comfortable

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

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

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

12 March 2026ariadne49

Very sort and good quality.

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

12 March 2026LoopyLou16

Go to winter walk leggings

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

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

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

11 March 2026Dip2253

Warm and great value.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

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

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

11 March 2026DianeCath58

Super warm and comfortable

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

11 March 2026Jane968

Wonderful at -4

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

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

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

07 March 2026sukisue2

Cosy

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

07 March 2026thesuburbanmummy

Warm but very polyester

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

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

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

06 March 2026Polly500

Nice and warm

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

06 March 202642Anon

Would recommend

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

06 March 2026Nobbers

Warm & long legged

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

06 March 2026Dippers44

Good quality a little long

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

A bit large

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit large

05 March 2026L_S_A_1

Super warm!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great leggings to keep you warm in the winter months.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

05 March 2026Georgie01

Warm leggings

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

05 March 20263retrievers

Basic winter necessities for daughter

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

04 March 2026Advil

Warm and comfy

Originally posted on marksandspencer.com (UK)

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 do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

1 of 197