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Cool Comfort™ Seamless Bum Boosting Shorts

Product code: T321563

About this style

These flattering shapewear shorts create a smooth silhouette while offering a subtle lift with removable bum-boosting pads. Made from lightweight fabric with our signature Cool Comfort™ technology, they're breathable for comfortable all-day wear. The seamless design with light control shaping eliminates visible knicker lines and smooths your figure, making them the perfect foundation beneath any outfit. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Style

Removable padding

Control: Light control

Non wired

Added Stretch

Features

Lifts and enhances your bottom for a sculpted silhouette

Your secret to staying cool all day is Cool Comfort™

Composition

90% polyamide, 10% elastane (exclusive of trimmings), Waistband - 84% polyamide, 16% elastane, Gusset (of underwear) - 81% polyamide, 11% cotton and 8% elastane

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

Do not dry clean

M&S

Cool Comfort™ Seamless Bum Boosting Shorts

€19.50

Colour

Waist

Matching items: Crop Tops
Free standard delivery over €75

Reviews (202)

3.8

56% Recommended this product

Mentions
28 May 2026Paddy501

Poor fit

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

The pads in the shorts for me were to far apart and the look was really fake. Good quality but the pads are not for me

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

26 May 2026Brambs

Hood quality but looked ridiculous.

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

This was bought to go under a dress it looked terrible literally felt like the pads were massive. Gave no shape at all.

Reviewer Ratings

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

How do you feel about the size?

Very large

20 May 2026Sza2026

Strange

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Weird shape not natural looking at all…… don’t recommend. I returned unfortunately.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

17 May 2026Ah butt

2nd pair

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Loved the beige pair so much I had to buy a black pair!

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

16 May 2026Booty2367

Very comfy

Originally posted on marksandspencer.com (UK)

Very comfy, looks great under a skirt. Bought for fancy dress but might wear on regular days

Reviewer Ratings

How do you feel about the size?

True to size

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Reviewer Ratings

How do you feel about the size?

True to size

07 May 2026Cancelled

Great quality and give a great shape.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great purchase my bum looked lovely and peachy in mt outfit

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

29 April 2026StephC43

Comfy bum pads but large is too large

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

These give me very odd proportions. I bought the largest size as I am plus size and the padding obviously parallel to size but I have a flat bum and these made me look very odd as so padded and protudes so much. Maybe just because I am not used to having a bum but very odd. They are comfy to sit on though. I always have to sit on cushions normally due to my lack of bottom.

Reviewer Ratings

How do you feel about the size?

Very large

Helpful?

Reviewer Ratings

How do you feel about the size?

Very large

16 April 2026Boda helper

Shape helper

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I bought it to wear it with a dress at a wedding. It is ok. It helps with the shape but it could be a bit more comfortable.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

30 March 2026CotswoldLou

Don’t bother

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

These gave a very unnatural shape and looking pretty daft

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

19 March 2026pickledaisy

Great padded shorts, give a nice shape on the rear

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great little padded shorts. If you could do with a bit of padding on the butt these do the job well. They are quite thick though so probably best worn in the winter months.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

14 March 2026Cozza57

Bumtastic!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I now have a bum to be proud of after years of ill-health lost my original one.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

25 February 2026Christine Mcnulty

Love these.

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Love these padded knicks,so comfortable,fit perfectly,looks great with jeans & dresses,highly recommend.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

25 February 2026All the names have gone

Not suitable

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Very disappointed. Large pads which wasn't what I was looking for. Just needed to shape my own rear! Returned.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

14 February 2026Infrequent_Shopper

Unnatural Shape

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

I find the enhancement creates an unnatural shape as it produces a localised mound on the cheek making it look as if a pair of socks have been put in your knickers.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

08 February 2026to long

Impressed

Originally posted on marksandspencer.com (UK)

Liked the product , but tended to roll down from waist band

Helpful?

07 February 2026Janettereviews

WOW ! what a difference these make

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I was on holiday and read about these in the newspaper - a reporter had lost a lot of weight (as have I) and had lost her bottom. There were photos of her with/without these shorts in the same pair of jeans, and I ordered them immediately as it make such a difference. I found them a little hard to get on the first time - but I have been used to wearing baggy stuff until now - however they were extremely comfortable after wearing all day. The most amazing thing was the comfort - since losing my (very big) bottom it's been uncomfortable sitting on a hard chair...... not any more! these provide the padding I need and my trousers look so much better. Definitely recommend these.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

02 February 2026Ma1957

Comfortable and lightweight

Originally posted on marksandspencer.com (UK)

Comfy to wear and gives a great shape. I would prefer them to be pantie style and the padded inserts to be moulded so they sit under the natural crease of your bottom!

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

01 February 2026AriomThims

Very good quality…

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Excellent quality, what I expect and always get from M and S, thank you

Reviewer Ratings

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True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

26 January 2026MrsJones2011

Game changer

Originally posted on marksandspencer.com (UK)

This is a game changer that really works for me. Totally natural look which requires a bit of positioning to suit your body. Totally unnoticeable.

Reviewer Ratings

How do you feel about the size?

True to size

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Reviewer Ratings

How do you feel about the size?

True to size

16 January 2026Helapas

Very good purchase

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I bought this shorts a week ago before long travelling. I struggle with numbness related to sciatica. So after the years no bottom. I'm very happy with my great purchase. They are very comfy, stay in 0lace not too big. Perfect for winter with tick trousers and jumpers. I wish they sale a summer version with smaller bottom pads. I recommend it.

Reviewer Ratings

How do you feel about the size?

True to size

Helpful?

Reviewer Ratings

How do you feel about the size?

True to size

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