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M&S Collection

Heatgen™ Maximum Thermal Long Johns

£28

COLOURIvory

Customers say:

Fits true to size()
SIZE

Customers say:

Fits true to size()
Also available in: Long Johns and Vest
Free standard delivery on orders over £60

Product code: T147412W

About this style

When the temperature drops, beat the chill in our thermal long johns. Regular fit with an elasticated waist and cuffed bottoms for snug and secure wear. Functional keyhole fly opening. Our clever Heatgen™ technology uses an innovative fibre blend, helping your body to generate and retain heat so you can stay warm when the weather gets chilly. Brushback texture feels gentle against your skin, while supersoft seams ensure there's no chafing.

Maximum warmth for keeping cosy in colder climates.

Details & care

Style

Regular fit

Features

Thermal

Soft and cosy brushed fabric that keeps warmth in

Heatgen™ technology

lightweight and supersoft, designed to keep you warm when the weather gets chilly

Composition

35% wool, 26% polyester, 23% viscose and 16% polyamide (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Tumble dry medium temperature

Iron at low temperature

Do not dry clean

Delivery, collection & returns

Delivery

Standard

Free over £60, or £3.99

Nominated Day

£5.99. Order by 7pm for delivery tomorrow

Collection

Collect from store

Order before 9pm for free next-day in-store collection

Returns

UK returns

Free

Exclusions apply

Reviews (552)

4.7

73% Recommended this product

Mentions
16 January 2025Jim 48
Verified Purchase

Warm in winter

Very warm especially for the winter and as advertised

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 January 2025Jack78
Verified Purchase

Warm and Comfortable

Yes, I recommend this

Warm and a perfect fit, comfortable good quality material. Ideal for outdoor walking on a cold day.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

13 January 2025TIMBERLEYH
Verified Purchase

Thermal underwear

Yes, I recommend this

Very comfortable thermal underwear which are stylish and a good price . Ideal to wear when playing golf to keep your legs warm from the elements.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

13 January 2025Mitwen
Verified Purchase

Ideal for cold weather

Yes, I recommend this

These thermal long johns are excellent quality and ideal for cold weather

Reviewer Ratings

Quality

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Style

Excellent

How did it fit?

True to size

13 January 2025Jim6481
Verified Purchase

Very cosy

Yes, I recommend this

Good quality well made product , comfortable and warm enough for the worst weather

Reviewer Ratings

Value for Money

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Value for Money

Good

How did it fit?

True to size

13 January 2025Suziebee 3
Verified Purchase

Great

Yes, I recommend this

My Husband loves them. He has arthritis so keep his bones from getting chilled

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How did it fit?

True to size

13 January 2025Lanelady
Verified Purchase

Excellent

Yes, I recommend this

Husband bought, extra layer when watching football

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

12 January 2025Sardor
Verified Purchase

Great quality. Warm, comfy. Easy to put on

Yes, I recommend this

A bit loose, but easy to put on and comfy and warm

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

How did it fit?

A bit large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

How did it fit?

A bit large

12 January 2025Shell1810
Verified Purchase

Very warm

Yes, I recommend this

Very warm and comfortable although legs did shrink after 1st wash.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

How did it fit?

True to size

12 January 2025Joo199
Verified Purchase

Great quality and do a great job

Yes, I recommend this

I bought these for my partner to wear out in the cold to work! He usually wears sports brands but actually prefers these and said they’re comfier and warmer.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

11 January 2025Petalinbarnet
Verified Purchase

Good quality purchase

Yes, I recommend this

Keeps my husband nice and warm in this minus degree weather

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

08 January 2025Sewingsilly
Verified Purchase

Excellent

Yes, I recommend this

No complaints from my husband. I have heatgen long sleeve tops, which i love.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

08 January 2025Mayaswell
Verified Purchase

Quality product

Yes, I recommend this

Bought as gift and recipient was pleased. Have been used and did the job. Worn by 6 foot tall man. Not washed yet.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

How did it fit?

True to size

07 January 2025SKIRTAHOLIC
Verified Purchase

Fit for purpose

Yes, I recommend this

Bought for golfer who is very happy with them. Warm and comfortable

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

How did it fit?

True to size

06 January 2025ngp30
Verified Purchase

Great quality and does what it's meant for!

Bought them for my husband as he works 1 day outside!

Reviewer Ratings

Quality

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

04 January 2025maperi
Verified Purchase

Black Thermal Long Johns!

Yes, I recommend this

Always buy my husband who is a builder, Thermal Long Johns from M&S, made the mistake of getting it elsewhere years ago and within days you could tell the difference with the M&S ones. As usual my husband is pleased with this purchase.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

03 January 2025Yorkshiregranny
Verified Purchase

Christmas present well received

Yes, I recommend this

Bought the longjohns and matching vest for my husband who is undergoing chemotherapy at the moment and feeling cold is one of the side effects. These are a perfect fit and do the job perfectly.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

03 January 20252499M
Verified Purchase

Good quality garment. Nice and warm.

Yes, I recommend this

Purchased for husband to replace a lighter weight set of thermal underwear. He likes the design, as it has a key hole access, which not all long johns have. They are a nice weight, without being lumpy. Keeps him nice and snug and football and other sport spectator events.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

02 January 2025Furbaby5
Verified Purchase

Maximum Warmth

Yes, I recommend this

My husband is always cold and thermals already, but I got him the Heatgen Maximum Thermals for when we went away at Christmas, being outside alot of the time. Straight away he noticed the increased warmth coming from wearing the thermals, along with the comfort & M&S quality. He's asked me now if he can have another pair, for a wash & wear set!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

How did it fit?

True to size

02 January 2025Cozy times
Verified Purchase

A good investment

Yes, I recommend this

An excellent purchase . I know it will serve me well during the winter . I hope it will not go out of fashion

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

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