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M&S

Heatgen™ Medium Thermal Mock Neck Top

£17

Colour

Customers say:

Fits true to size()
Size

Free standard delivery over £60

Product code: T329223

About this style

This long-sleeved top is crafted with our Heatgen™ technology, offering medium-level warmth and exceptional softness. Its added stretch ensures a comfortable fit, making it ideal for layering or wearing on its own. A mock neck adds an extra cosy feel. M&S Collection: versatile styles in modern shapes with unique and playful details.

Details & care

Item details

Model Height: 5ft8"/172cm

Model is wearing size: 8

Style

Added Stretch

Features

Heatgen™ technology

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

Composition

55% acrylic, 39% viscose and 6% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

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 (169)

4.6

69% Recommended this product

Mentions
25 December 2025Donnerhall
Verified Purchase

Good quality

Yes, I recommend this

Lovely colour; fits snug and really warm and cosy for the winter months .

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 December 2025Greto64
Verified Purchase

Hestgen medium thermal

Yes, I recommend this

Really like this colour great. Looks good under a jumper and comfortable. Will buy more colours.

Helpful?

18 December 2025Penny May
Verified Purchase

ABSOLUTE RUBBISH

No, I don't recommend this

Don’t bother with this top if you want a product that keeps you warm.

Helpful?

18 December 2025Jeany 94
Verified Purchase

You need to size up!

Yes, I recommend this

Great looking item but I am a size 8 and found this far too tight fitting, including around my neck - almost like being compressed.

Helpful?

17 December 2025Madsy
Verified Purchase

Nice and cosy!

This was a nice change to the usual necklines. I thought it might be too hot but it’s not. Quite cosy in fact and stylish. Colour is good too as it goes with most things. Would like it in more colours.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 December 2025Tuppence Devine
Verified Purchase

Very cosy with a stylish neckline

Yes, I recommend this

Lovely fabric. Comfy and warm. I love the neckline as it can be worn underneath sweaters with a wider neckline for extra warmth.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 December 2025cornedbeef
Verified Purchase

Super soft and warm

Yes, I recommend this

Love the colour , the size , the warmth and the neckline as it protects against itchy jumpers. The neck is unfinished though and would benefit from being stitched rather than just folded in. Would like more colours though.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 December 2025TMQ1
Verified Purchase

Always the business

Yes, I recommend this

M and S heat gen underwear is second to none. I suggest it to my rowing and motor biking friends all the time!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 December 2025GillyChe
Verified Purchase

Beautifully warm and comfortable

Yes, I recommend this

A slightly snug fit, I went up one size to get a comfortable fit. Beautifully warm to wear under jumpers or cardigans. Washes well .

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

15 December 2025Annie1john2
Verified Purchase

Medium warmth and lovely colour

Have this thermal in another shade but this beige colour wrinkles badly along the neck, shame

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025Petite Busty Girl
Verified Purchase

Very cosy

Yes, I recommend this

Good quality layering piece. Love the high neckline which is very comfortable.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025Denday
Verified Purchase

Great quality

Yes, I recommend this

Lovely thermal top, fits well and definitely keeps you warm.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 December 2025silverbuyer15
Verified Purchase

My go-to when weather turns cold

Yes, I recommend this

I have a variety of these in turtle and crew necks for when weather turns cold (medium strength is fine for me) under other tops. Was delighted when colour range expanded and now wear them as tops in their own right with camisole under if chilly as opposed to cold. They are close fitting so wear size 12 when under something else and a 14 when "stand alone".

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 December 2025Loubie7
Verified Purchase

Locked in warmth

Yes, I recommend this

Locked in warmth supplied with this. Originally ordered scoop neck but this is so much better. Soft and washed well.Bigger range of colours needed.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

12 December 2025JEKy
Verified Purchase

Warm and cosy

Yes, I recommend this

Very soft fleecy fabric. Really warm base layer. Snug, close fit. Good colour.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 December 2025Scrimbo
Verified Purchase

Small sizing

Yes, I recommend this

Comfortable, soft feel material, kept the size 10 though on the snug side, despite being a usual 8 to 10 in most clothes. Suggest consider going up at least one size unless you like a tight fit.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

06 December 2025MagsieK
Verified Purchase

Comfy and warm

Lovely and comfy warm. Washes well. Would love to have more colour choices

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

06 December 2025Getthebasicsright
Verified Purchase

Must have winter staple

Yes, I recommend this

Good neutral colour. Im a 12 but the 10 fits well

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

05 December 2025Val62val
Verified Purchase

Soft, Warm, lovely, washes well

Yes, I recommend this

Super soft and very warm, great for layering, and washes well,

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

04 December 2025PersonSB
Verified Purchase

Great Quality

Yes, I recommend this

Nice fabric, doesn't look like most thermal clothing. Very comfortable and warm

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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