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M&S

2pk Thermal Knee High Socks

£10

£8

Colour

Special Offer

Size

Free standard delivery over £60

Product code: T609697

About this style

Feel extra cosy with these thermal knee-high socks. Handy pack of two pairs, made with added stretch and our innovative Heatgen™ technology for lightweight, supersoft warmth. M&S Collection: versatile styles in modern shapes with unique and playful details.

Details & care

Style

Added Stretch

Features

Soft and cosy brushed fabric that keeps warmth in

Composition

57% acrylic, 30% viscose, 12% polyamide and 1% elastane lycra®

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 (82)

4.5

71% Recommended this product

Mentions
14 December 2025AKW25
Verified Purchase

Warm, excellent quality.

Yes, I recommend this

Solved all my cold legs issues when wearing wide legged trousers. Absolutely love.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 December 2025Cathy NY
Verified Purchase

Nice socks

Yes, I recommend this

I’ve had these socks before. They fit well and are warm but I wouldn’t call them thermal. I use them for dog walking. They always wash well and last well

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 December 2025bmcg
Verified Purchase

Cosy socks for winter

Originally posted on marksandspencer.ie

Yes, I recommend this

Lovely and warm, and they stay up comfortably. Nice under trousers in the winter.

Helpful?

10 December 2025AER184
Verified Purchase

Warm but lightweight and without bulk.

Yes, I recommend this

Warm but lightweight! I use these for skiing, unusual yes, but they give maximum contact with your boots.

Helpful?

09 December 2025Jenny F 23
Verified Purchase

Warm and comfortable

Yes, I recommend this

Seem good quality and stay up. Warm and comfortable.

Helpful?

07 December 2025Queuester
Verified Purchase

Great thermal knee highs.

Yes, I recommend this

I really like these Knee High Thermal Socks. Absolutely lovely to wear under cropped or wide leg trousers to keep your ankles and legs warm. I like that they’re high enough to come above my slightly higher winter ankle boots which lace up just above my ankle , and they never slide down. It’s so great to get socks which stay up! The only reason I’m giving them 4 stars rather than 5 is because my feet are a size 7 and the larger size 6-8 are quite big in the foot so although fine for me, they might be too big for anyone of a size 6, though it depends how you like your socks to feel. I’m going to buy another pack of two or more. Recommended !

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

07 December 2025Tuppence4
Verified Purchase

Cosy legs!

Yes, I recommend this

Excellent. Perfect for keeping warm if sitting at your desk in cold weather as fit right up to the knee. I have been looking for stylish knee highs like these for ages. More hard wearing than merino wool knee socks and good value.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

06 December 2025Helen Kathleen
Verified Purchase

Lovely warm socks

Yes, I recommend this

Lovely and warm socks just what I needed for work and great length

Helpful?

06 December 2025Sarah I W
Verified Purchase

Biocide!!! Unnecessary chemical pollution.

No, I don't recommend this

Ordered these as cosy knee high socks but found when they arrived that they are treated with "Active biocidal substance" dimethyloctadecyl ammonium chloride. Unnecessary contamination of my body with a chemical. Surely people can wash their feet and change their socks daily so this chemical treatment is unnecessary and adds to the toxic load that we already experience in today's polluted environment. Washing the socks would presumably put the chemical into the water supply. I certainly do not want it. I had avoided buying socks treated with this biocide in-store, and I ordered on-line thinking I was avoiding it, since the biocide was not mentioned on the product information on-line! Waste of my time and I will be returning them. I WOULD LIKE A REPLY FROM M&S ABOUT THEIR USE OF THIS CHEMICAL.

Helpful?

04 December 2025Loopylorr
Verified Purchase

Perfect

Yes, I recommend this

Beautiful quality & good value for money, have yet to try them on so unsure how well they will fit, hopefully will have a lot of give in them as I don’t like anything to feel to constricted, but I’m sure they’ll be great

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 December 2025outofworkandlovingit
Verified Purchase

Think I’m just unlucky on this occasion

Yes, I recommend this

On opening they were fab however after one wear the one pair has a hole in the toe area so very disappointed - I will be taking them back to a store for an exchange hopefully as they do keep your legs warm

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 December 2025valueformoneylady
Verified Purchase

Not as good as I hoped.

The socks are long enough but far too tight around the top. They are not like other thermal socks I have purchased in the past, but quite thin.

Reviewer Ratings

Comfort

Fair

Helpful?

Reviewer Ratings

Comfort

Fair

01 December 2025Heraclitus73
Verified Purchase

Don't bother

No, I don't recommend this

Very comfortable but do not wear well. After several washings the length of the socks varies enormously. This is most annoying when pairing them up and when wearing them I often find that one sock is several inches shorter than the other - most uncomfortable. Also the socks shed a great deal of black fluff.

Helpful?

30 November 2025Mins25
Verified Purchase

Warm Hard Wearing Socks

Yes, I recommend this

Great to get warm long length socks for wearing under jeans in the winter. The feet are cosy and hard wearing. More colours would be good

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 November 2025glasanne
Verified Purchase

Good quality

Yes, I recommend this

Replacement for older socks, have to say I think quality and warmth has improved on old versions. Great length as well

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

28 November 2025Audstone
Verified Purchase

Great quality

Yes, I recommend this

Love these warm thermal socks and so much better than previously bought as they don’t shed black bits on carpet

Helpful?

27 November 2025Lissie72
Verified Purchase

Great quality

Yes, I recommend this

Great quality, love the reinforced toes and heels, hard wearing, just the job

Helpful?

27 November 2025Niknoks37
Verified Purchase

Recommend!

Yes, I recommend this

perfectly warm and comfortable. I have narrow calves and struggle to find socks that stay up. These did and they kept my feet snug. Also, first pair of black socks from M&S that do not produce fluff when you take them off!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

27 November 2025myee
Verified Purchase

Cosy!

Yes, I recommend this

Great socks and don`t argue with your trousers, so warm love them!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

25 November 2025Ladygrey60
Verified Purchase

Best socks ever!

Yes, I recommend this

Great socks that stay up, just the right thickness, keep my feet very warm and are very comfortable.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

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