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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

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 (913)

4.8

71% Recommended this product

Mentions
18 December 2025ha66
Verified Purchase

Very satisfied

Yes, I recommend this

My husband was very pleased with this thermal long sleeve top. It was true to size, cosy and very comfortable.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

18 December 2025Chrisiii
Verified Purchase

Nice and warm but gets bobbley in the wash

Yes, I recommend this

My husband gets very cold and these are ideal, but once washed they can become bobbly - never wash them with items that shed fluff like towels. The fabric will attract all the bits

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

17 December 2025cornedbeef
Verified Purchase

Lovely warm cozy item

Yes, I recommend this

Bought for my husband who had purchased the ordinary thermal tops before. He says theses are the best he’s had. Really comfy and warm.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

16 December 2025mazzo64
Verified Purchase

Great thermals!

Yes, I recommend this

Always buy this for my husband who works outside. They are a good thickness, keep him warm and wash really well. The only slight snag is that they are very long! Other than that I would recommend.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

15 December 2025Lori58
Verified Purchase

Christmas gift

Bought this for Christmas for my disabled grandson who is always cold. Hope this keeps him snuggly.

Helpful?

15 December 2025Barrie ftf
Verified Purchase

Very warm and cosy

Yes, I recommend this

I bought this to keep warmer in winter, and it dies exactly that. it's very comfortable

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

14 December 2025PP2969
Verified Purchase

Lovely Top

Yes, I recommend this

Very warm and excellent quality. I Bought another.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

12 December 2025Nw07
Verified Purchase

great quality

Yes, I recommend this

Needed to go down a size from L to M and fitting was much better

Helpful?

11 December 2025Magagnotti
Verified Purchase

Just the job.

Yes, I recommend this

I bought this as an addition to my husbands collection. He is a rather poorly man and feels the old quite easily. They are very good at helping to keep him warm and cosy.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

10 December 2025Alberta57
Verified Purchase

Great quality

Yes, I recommend this

Bought for my husband great quality well made he says it’s lovely and warm good fit

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

09 December 2025Shonz
Verified Purchase

Thermal vest

Yes, I recommend this

Recipient delighted with their thermal vest. Soft and cosy. Good fit.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

07 December 2025Mrs Tubbs
Verified Purchase

Great cosy vest .

Really delighted with the thermal vest . Very warm & cosy .

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

07 December 2025PLBM
Verified Purchase

Excellent for use in colder weather

Yes, I recommend this

I bought this for my wife because she kept borrowing mine. I've been wearing my own ones for a couple of years and they are really cosy.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

06 December 2025Curious George
Verified Purchase

Super

Yes, I recommend this

They are lovely and warm and I have been buying thermal vests for a good few years but they have never been as warm as these

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

05 December 2025tazzigirl
Verified Purchase

Value and top quality

Yes, I recommend this

Warm and good quality, husband delighted with these

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 December 2025bagshotboy
Verified Purchase

Great tuckinability!

Yes, I recommend this

Good quality, long thermal top that won't ride up with wear!

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

02 December 2025
Verified Purchase

Great item

Yes, I recommend this

Great item. Dos'nt bunch up under whatever your wearing it under. I wear a little cardigan over it and you'ed not know it was on top of anything.

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

01 December 2025jollyjoyce
Verified Purchase

Warm

Yes, I recommend this

My husband feels the cold and this vest solved the problem !

Reviewer Ratings

Comfort

Excellent

Helpful?

Reviewer Ratings

Comfort

Excellent

30 November 20251234 Karen
Verified Purchase

Max gen

Yes, I recommend this

Although my husband is pleased with it, it’s not as good as the one I bought for myself the previous year.

Reviewer Ratings

Comfort

Good

Helpful?

Reviewer Ratings

Comfort

Good

30 November 2025DorisSarah
Verified Purchase

Snug

I have bought one for myself my husband and my son. We are all delighted how snug and soft and warm they are. Wash well too.

Helpful?

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