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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

Customers say:

Fits true to size()
Waist

Matching items: Thermal Top and Thermal Fleece Top
Free standard delivery over £75, otherwise from £3.99

Reviews (1211)

4.7

78% Recommended this product

Mentions
11 September 2026Kazzz34
Verified Purchase

Brown leggings size 10

Yes, I recommend this

Purchased for Autumn and have only tried them on to see if they fit... a little baggy around thighs but I have lost a lot of weight due to illness. Will be wearing with a tunic in the colder months.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

11 September 2026Lizzie127
Verified Purchase

Lovely and warm

Yes, I recommend this

For myself, purchased last winter, so warm and comfortable , I purchased early to make sure I got my size.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

11 September 2026Hay1ey82
Verified Purchase

Thermal Fleece Leggings

Yes, I recommend this

So thick and warm. Love these and I get a new pair each year. I am size 16 / 18 and got a size 20 as they are normally on the smaller side in terms of the sizing.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

09 September 2026ClaireH24
Verified Purchase

Excellent

Yes, I recommend this

Warm cosy and absolutely useful for home working at a desk all day

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

22 August 2026BUN 49
Verified Purchase

Terrible fit

No, I don't recommend this

Very small and uncomfortable , would not recommend

Helpful?

22 August 2026Sandexs
Verified Purchase

So good!

Yes, I recommend this

I get these for winter at work. They arent too thick to wear under your regular clothes. They wash and dry well. And they last for ages. I onky had to buy more because i needed a smaller size. They are form fitting almost like a light shapewear. So if you want them more loose fitting, go up a size

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 June 2026K happy
Verified Purchase

The winter ‘Must Have’

Yes, I recommend this

I love these leggings - you can use them as tights or leggings and they are so warm and quite robust. They can also go under trousers etc. I hate to be cold and these leggings mean I don’t have to be.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

19 June 2026Madelaine56
Verified Purchase

So good!

I've bought several pairs of these very soft and warm thermals. I love them. So comfy and so warm. They double as usual dergarments in the daytime and pyjamas at night. Would highly recommend!

Helpful?

24 May 2026JR04
Verified Purchase

Good quality but far too long

I've had Heatgen leggings in the past that have washed well and was keen to replace them. I had to go a size less ( even though I'm the same weight) and the length far too long so will have to get them turned up.The medium thermal were thinner and the maximum thermal thicker so not able to find an exact replacement. They are good quality but a shame not to find a similar type.

Helpful?

19 April 2026Emma3878
Verified Purchase

Warm, soft and comfortable

Yes, I recommend this

Gorgeous legging, so soft and warm, runs big to size so recommend a size down

Reviewer Ratings

How did it fit?

Large

Helpful?

Reviewer Ratings

How did it fit?

Large

14 April 2026Auntie81
Verified Purchase

Very warm.

Yes, I recommend this

Really warm and comfy.Great price. Love them. Well worth the money.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

09 April 2026Charlotte JSB
Verified Purchase

Soft and comfy

Yes, I recommend this

Lovely soft leggins. Lightweight but warm and cosy.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

05 April 2026Charlotte 14
Verified Purchase

Love them

I bought these in the sale . Brilliant lovely and warm wish l had bought them years ago . Bought more can you do extra short .recommend them

Helpful?

04 April 2026Caroles2
Verified Purchase

Heathen thermal leggins

Yes, I recommend this

These are really warm and comfortable. Love wearing these.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 April 2026LC 2
Verified Purchase

Just a little long.

Yes, I recommend this

Good quality for the price. Will hopefully be warm as I have bought them for a winter holiday. I’m 5ft 4ins & whilst they are a little long on me I have kept them,choice of length would be good. I think I will buy another pair in brown.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

02 April 2026Topaz62
Verified Purchase

Not great

No, I don't recommend this

These are lovely & soft but unfortunately just after a couple of washes they bobble.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

31 March 2026Jenyo
Verified Purchase

Super warmth

Yes, I recommend this

Best I have found to keep cold and damp at bay, aching joints no longer ache

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

30 March 2026pezza999
Verified Purchase

Toasty Thermals

Yes, I recommend this

Great leggings to match thermal top. Very warm and cosy to wear

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

29 March 2026Justu
Verified Purchase

Excellent

Yes, I recommend this

These leggins are great, I wear mine just around the house & yes they are a bit long as I’m only 5ft3 but they still look ok, tgey wash & it oh great but I don’t tumble dry them.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

29 March 2026Saraik
Verified Purchase

Nice and warm

Yes, I recommend this

Perfect base layer for a recent ski trip, didn’t feel cold at all and fitted perfectly

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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