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M&S

Heatgen™ Thermal Long Sleeve Shaping Body

£25

Sorry, this item is no longer available

Product code: T329105

About this style

Sculpt your figure with this Heatgen™ Thermal Long Sleeve Shaping Bodysuit. The soft, brushed fabric offers light control for a streamlined silhouette, while the flattering long sleeves and high turtle neck add warmth and style. Made with innovative Heatgen™ thermal technology, this effective shaper provides lightweight warmth on chillier days without adding bulk. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Item details

Model Height: 5ft9"/176cm

Model is wearing size: 12

Style

Control: Light control

Features

Heatgen™ technology

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

Composition

45% acrylic, 30% viscose, 19% polyamide 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 (49)

4.8

76% Recommended this product

Mentions
02 February 2026NewJean
Verified Purchase

Excellent

Great quality and so cosy and very comfortable to wear

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 January 2026NER46
Verified Purchase

Quality M&S

Superb garment. The wearer tells me that the thermal capacity was much appreciated as was the fit.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 January 2026cann5387
Verified Purchase

Love This!

Yes, I recommend this

This is superb! I love the shaping around the belly and under the bust, it's not see through in the slightest, and has kept me warm these past couple of cold weeks. I've already ordered another one.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 January 2026Sandstone222
Verified Purchase

Previously bought but quality was different.

I have previously bought this onesie and found the quality to be inferior. Not what I was expecting. I will keep it as a stand by.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

17 January 2026Barbarabaker
Verified Purchase

Black body

Yes, I recommend this

The fit was perfect for me , good quality and loved the funnel neck , nice and cosy and also stylish. Well priced

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 January 2026Semiramissis
Verified Purchase

Nice quality

Yes, I recommend this

I got it a size up because I have long torso. It does have a very soft quality and looks good with a gilet for instance. Buttons at the crotch do not rub, so no painful wear either.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 January 2026Artyme
Verified Purchase

Good quality and fit.

Yes, I recommend this

I bought it for warmth and to stay in place unlike the tops that tend to move up. I am very happy with my purchase and would recommend it. Please could we have a choice of colours.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 January 2026Vevo
Verified Purchase

Love it! Really snug, so I went a size up.

Yes, I recommend this

Love it! Really snug, so I went a size up. Sleeves are long enough to keep wrists warm too. Really helpful to have 2 sets of poppers.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

09 January 2026Amanda Jane Oloughlin
Verified Purchase

So warm and cosy

Yes, I recommend this

I wore this with the wool mini skirt and opaque black tights I think it looked great

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 January 2026CKnightly
Verified Purchase

Amazing quality

Yes, I recommend this

This product is fantastic. I bought 16-18 and I’d say the true size is a 16. It’s warm and such a relief on the lower back to be cosy! I wore this under my skiing outfit. Excellent!

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

03 January 2026MattJ1644
Verified Purchase

Warm & comfortable

Yes, I recommend this

Bought as a Xmas gift and the wearer describes it as very warm and comfortable

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 December 2025Edna Quinn
Verified Purchase

Great buy.

Yes, I recommend this

Warm and flattering, excellent fit and flattering.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

23 December 2025ellenw15
Verified Purchase

Excellent

Yes, I recommend this

Fits perfectly and does what it promises …thank you M&as

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 December 2025KingaH
Verified Purchase

Great item

Yes, I recommend this

Super happy with this. Great quality and especially with the fit which is something I regularly struggle with being tall and therefore long in the body and arm. Allows sufficient stretch without thinning the material. Purchased for skiing holiday - can’t comment on warmth as haven’t been yet.

Reviewer Ratings

How did it fit?

A bit large

Helpful?

Reviewer Ratings

How did it fit?

A bit large

14 December 2025
Verified Purchase

Great in every way

Yes, I recommend this

This body is lovely in every way, it fits great, i bought size small, so its true to size, sleeves are nice and long, its smooth around waist and feels non itchy, warm and just perfect for every day, by the time i liked so much i went to get another one but my size sold out:( m&s please restock :) x

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 December 2025LyndaON
Verified Purchase

Lovely shapewear body

Yes, I recommend this

Love this shapewear baby. It’s dressy and practical, and very cosy. I am a 10-12 and went for the 12-14 which is very comfortable.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

13 December 2025Jaen1
Verified Purchase

Perfect

No, I don't recommend this

Great fit, sometimes they can be short in the body but no problems. Lovely thick fabric and neck not too long or too short. Very impressed.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 December 2025jules2
Verified Purchase

Disappointing fit

No, I don't recommend this

Body suit is lovely quality but far too small. I’m a size 12 and bought the 12-14. Very very tight and am returning

Helpful?

10 December 2025Poppyfield
Verified Purchase

Excellent purchase

Originally posted on marksandspencer.ie

Yes, I recommend this

Good quality super soft thermal fabric and most comfortable. Fits snugly on body and true to size. Perfect for layering as not in any way bulky. Would purchase this again.

Helpful?

09 December 2025Junglebunny25
Verified Purchase

Really warm

Yes, I recommend this

Fantastic body, very warm and comfortable to wear. A little bit expensive but would still recommend

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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