PLEASE UPDATE YOUR BROWSER OR CHOOSE AN ALTERNATIVE

We have updated our website for a faster experience. To benefit please update your browser or choose an alternative.

M&S Collection

Heatgen™ Medium Thermal Mock Neck Top

€ 22

COLOURBlack
SIZE

Free standard delivery over €50

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: 12

Style

Added Stretch

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

FREE over €50, or €4.50

Collection

Collect from store

FREE

Returns

Ireland returns

FREE

Exclusions apply

Reviews (47)

4.6

57% Recommended this product

Mentions
2025 januar 14Flic67

Great Insulation

Originally posted on marksandspencer.com (UK)

I bought this garment as a Christmas present for a friend. She really loved it and wore it three times in a week both indoors and outdoors. She reported that despite plenty of energetic activity, the top helped to regulate her temperature and stayed fresh. It felt cool when it was first put on, but soon felt like a second skin. It was really comfy and didn’t feel like it was being worn. With the high neck, she didn’t need to wear a scarf, which is a really telling factor for her when out in the cold, as she doesn’t usually go out without one around her neck. Top marks for the insulation. The medium thermal was just right.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

2025 januar 12Fudge56

My fave of all the thermal tops if only .....

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love the neckline. So sort & comfortable to wear. If only it came in more colours as at the moment it looks like I'm wearing the same top everyday ! I'm not have 2 smoke & 1 black !

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

2025 januar 092Chilli

Beautiful top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely neutral colour and neckline. Sits beautifully without bulk

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2025 januar 08Yellowbelly7

Ideal neckline, not too high

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very comfortable and the neckline I wanted, not a polo but high enough to keep my neck warm.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Good

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2025 januar 08Teenie frae Troon

True to size

Originally posted on marksandspencer.com (UK)

Love the mock turtle neck. I have it in Smoke and Black. I Would now like it blue and red. Thank you

Reviewer Ratings

Quality

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

2025 januar 07ValkyrieS

Innovative Neckline - Quality Thermal

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I purchased this in the Smoky Grey colour, which is in fact a pink/grey so quite unusual. I was intrigued with the new mock neckline, which is good for the colder season but also a welcome departure from polo necks which have a tendency to droop and lose shape. After reading the reviews I decided to order in a size 16 rather than my usual 14, as I can’t abide clothing that is too fitted…even a thermal. This item has the generally reliable M&S quality, comfort and wearability.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

2025 januar 07Kells Bells1

Super warming

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Excellent value, super warm and comes in lots of lovely colours

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

Very large

2024 decembre 26Nai M

Great value and quality, versatile, lovely colours

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Very warm and soft material, just lovely to wear! Bought to wear under jumpers or shirts but could be worn as a T-shirt

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 25pengen59

So very versatile to wear, love the comfort!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Super soft comfy fabric offering wonderful warmth of Heatgen. Love this! So much so, bought 2 black 2 smoke colour, my normal size and also size up. Fabulously versatile too!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 24Mcbs2406

Great quality, love the soft feel.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Flattering style. Good cut for a straight fit. Love the neckline. Lightweight and soft, but still very warm. Does not wrinkle after washing. Excellent quality, but does run small in size. I recommend ordering one size up. I will likely buy more.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Moderate warmth

How do you feel about the size?

A bit small

2024 decembre 21Heads

Cosy

Originally posted on marksandspencer.com (UK)

Am very pleased and now have 2.I wish they did a cream color and that would round up all I need.Very warm and I certainly would recommend

Helpful?

2024 decembre 21Loveawarmjumper

Snuggly and a good price

Originally posted on marksandspencer.com (UK)

A lovely soft and very warm garment. A good buy so I had to get another one.

Reviewer Ratings

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Value for Money

Excellent

Style

Good

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

2024 decembre 20Lindyinhants

Smart warm and comfortable

Originally posted on marksandspencer.com (UK)

This is not only smart but has a soft bushed side next to your skin it is very warm. Neck li e is perfect. High enough to keep you warm but not so high it gets in the way

Reviewer Ratings

Quality

Excellent

Helpful?

Reviewer Ratings

Quality

Excellent

2024 decembre 14Ehal

Too small

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

In Far too small I’m ha small 14 and it’s skin tight. I bought two and am returning the unworn one.

Reviewer Ratings

Quality

Good

Value for Money

Average

Style

Average

Comfort

Poor

Warmth

Moderate warmth

How do you feel about the size?

Very small

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Average

Style

Average

Comfort

Poor

Warmth

Moderate warmth

How do you feel about the size?

Very small

2024 decembre 14Dizo53

New Neck

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

The top itself was very warm and comfortable but I didn’t like the neck. It crushed up and I couldn’t tell the front from the back. Much prefer the turtle necks as they sit nice at the neck.

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Good

Style

Average

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 10Chinchilla82

Great quality.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great product, perfect neckline, soft and warm. Good fit.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 1029dee

A warm winter base layer

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Beautifully warm and comfortable and long enough to tuck into trousers if necessary, a snug fit but not tight, I’m very pleased

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 10Suzycoco

Great warm top

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This top is lovely and warm without being bulky would definitely recommend it

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Warm

How do you feel about the size?

True to size

2024 decembre 08Nannie52

Oh so cosy top!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely warm thermal which can be worn as a top or under a blouse or sweater. I have bought a grey and black one.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

2024 decembre 05Kimmy25

Does what it says on the label!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Lovely and warm and cosy. It really does help keep the old out.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

Warmth

Very warm

How do you feel about the size?

True to size

1 of 8