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M&S

Heatgen™ Maximum Thermal Long Sleeve Top

£28

Colour

Size

Also available in: Long Johns and Vest
Free standard delivery over £60

Product code: T147404W

About this style

This warm thermal baselayer top combines effective heat retention with everyday comfort. The regular fit with stretchy ribbed neck and cuffs keeps its shape, while the long sleeves provide coverage for cooler winter days. Perfect as an undershirt or standalone layer, it's made with 35% natural fibres for insulation and featuring Heatgen™ technology that retains body heat in cold conditions. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

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

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 (975)

4.8

72% Recommended this product

Mentions
11 February 2026Kammie
Verified Purchase

Warm and cosy top

Yes, I recommend this

I bought the ladies version of these and the matching leggings for wearing under my walking clothes and coat when walking the dog. I loved them that much I bought my husband this one and he loves them too.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 February 2026Newshoehappy
Verified Purchase

Good quality warm vests

Yes, I recommend this

My husband loves these vests when he is playing golf, they keep him warm and still look smart under his golf tops.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 February 2026Ali0
Verified Purchase

Perfect

Yes, I recommend this

Top marks from my dad who feels the cold a lot. It’s super soft as well as warm on these cold winter days. He likes it so much, I’m going to get him some more.

Helpful?

08 February 2026Proud and welsh
Verified Purchase

Good

Yes, I recommend this

I bought one like this a few years ago for my husband, the new one even though it's comfortable and soft, it's not quite as thick as the original.

Helpful?

07 February 2026niggly
Verified Purchase

Excellent thermal top

Yes, I recommend this

Great top. Fits well, very warm and comfortable. Hand washed so far and no shrinkage.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 February 2026noodles231
Verified Purchase

Toasty

Yes, I recommend this

The vest is really warm and works very well in layers

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

04 February 2026Anne H248
Verified Purchase

Good warmth

Lovely and warm. Sleeves a bit too long. Useful for coldest days

Helpful?

04 February 2026ShootingRobert
Verified Purchase

Excellent product.

Yes, I recommend this

This product is even better than described. Keeps you really warm, unbelievable.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 February 2026Marilyn Ann T
Verified Purchase

Just the Job

Yes, I recommend this

Thermal top purchased for Son in Law, who tells me they are brilliant, so warm & comfortable he asked for another! Wear & wash very well.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

03 February 2026Sue2346
Verified Purchase

Great quality.

Yes, I recommend this

Bought for my partner to wear under his pyjamas to keep him warm at night. Does the job nicely.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 February 2026greara
Verified Purchase

Really warm

Yes, I recommend this

I’m told this top is noticeably warmer than the medium weight thermal top. Good value.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 February 2026Neera
Verified Purchase

Best thermals

Yes, I recommend this

Warm and cosy. Everything you need for the winter period

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

31 January 2026CardinalTwanky
Verified Purchase

Warm layer

Yes, I recommend this

Female buyer - great weight, warm and soft medium layer which is perfect when you want both base and outer layers. Quite long for me (4ft11) so ticks in nicely without riding up.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

29 January 2026TraceBristol
Verified Purchase

Great quality

Fits nicely and keeps me snug and warm. Colour doesn’t fade when washed.

Helpful?

29 January 2026Annette6
Verified Purchase

Warm

Yes, I recommend this

If your going to buy a thermal , this one is great . I always purchase a mans thermal for winter under chunky clothes. This one is so warm. Nice material.

Helpful?

28 January 2026South East buyer
Verified Purchase

Excellent quality

Yes, I recommend this

Excellent quality, worn for work under work top, great warmth. Washes well. Very pleased

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

28 January 2026Rob 1690
Verified Purchase

Good quality and reasonably priced

Yes, I recommend this

Very useful and beneficial at this time of year. Good quality and reasonably priced

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

27 January 2026Gillyflower06
Verified Purchase

Teenager loves it.

Yes, I recommend this

Teenage son loves this. Wears it as base layer and as his main top too. He says it’s really soft, warm and retro!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

25 January 2026DinoSkipton
Verified Purchase

Soft and warm

Yes, I recommend this

Used as a base layer skiing. Nice and warm and wicked away moisture

Helpful?

24 January 2026Val anon
Verified Purchase

Great purchase!

Yes, I recommend this

Bought this for my husband as he feels the cold a lot. It is really good quality and keeps him really warm. Great purchase!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

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