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Cool Comfort™ Seamless Bum Boosting Shorts

M&S

Cool Comfort™ Seamless Bum Boosting Shorts

£15

Colour

Sale items

Customers say:

Fits true to size()
Waist

Free standard delivery over £60

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

Cool Comfort™ technology

keeps you cool all day long

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

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 (197)

3.8

57% Recommended this product

Mentions
25 February 2026Christine Mcnulty
Verified Purchase

Love these.

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 February 2026All the names have gone
Verified Purchase

Not suitable

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

14 February 2026Infrequent_Shopper
Verified Purchase

Unnatural Shape

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 February 2026to long
Verified Purchase

Impressed

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

Helpful?

07 February 2026Janettereviews
Verified Purchase

WOW ! what a difference these make

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 February 2026Ma1957
Verified Purchase

Comfortable and lightweight

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 February 2026AriomThims
Verified Purchase

Very good quality…

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 January 2026MrsJones2011
Verified Purchase

Game changer

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 January 2026Helapas
Verified Purchase

Very good purchase

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 January 2026her_
Verified Purchase

Great job M&S

Yes, I recommend this

I purchased 2 thinking they wouldn't be sufficient but wow - added perfect shape to my otherwise flat bottom so jeans hung beautifully and more comfortable to sit with cushioned support - perfect!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

30 December 2025shootingstar30
Verified Purchase

Fabulous, very sexy.

Yes, I recommend this

These are great for a special occasion. They give a nice shape under fitted clothes. I’m a woman of a certain age and lost the shape in my rear. I would definitely recommend them. Nice and light to wear, not hot like Spanx.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

29 December 2025LilyB63
Verified Purchase

Confidence Booster!

Yes, I recommend this

I've been struggling to regain my figure after unintential weight loss, and decided artificial enhancement was needed! Having read the mixed reviews for these pants I was hesitant to make a purchase, but for £15 I thought it was worth taking the risk, and I'm so glad I did! I've only worn them with black trousers so far, but I feel much more confident about my figure. They felt like I was wearing a pair of cycling shorts at first, but I got used to them after a while and they're very comfortable. Like a previous reviewer, I too am normally a size 10, but opted for the medium size, which fits nicely.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 December 2025Pink290672
Verified Purchase

Great quality

Yes, I recommend this

Does exactly as it says and is comfortable to wear, only down side is that I think it will be too hot in the summer and that's when you will use it the most

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

24 December 2025Trude21
Verified Purchase

Needs tweaking

I take a 10 in trousers. M fitted me lovely. S was on the tight side at the waist. BUT The inserts of the medium are way too big. They look enormous on my size 10 frame. The size of the inserts in S are much better, significantly smaller and suited my body size much better. Wish I could have chosen insert size. The inserts are separated quite a bit and look weird but as soon as trousers go on that is no longer an issue as it looks very natural.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

23 December 2025Isobella23
Verified Purchase

The BEST

Yes, I recommend this

Out of all that i have bought and now binned these are absolutely the best .Gives such a nice shape to your body.So happy i found these already bought 4.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 December 2025Llesley
Verified Purchase

Good padding

Yes, I recommend this

These shirts are providing the necessary comfort for me to sit down for Pilates 🧘‍♀️. I’d recommend them. However loose 1 star ⭐ for the waist band rolling down.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

12 December 2025Ditsy Blonde
Verified Purchase

Give a little extra oomph

Yes, I recommend this

These "bum boosters" help give my relatively flat bum a nice boost. I cheated a bit and put some extra soft padding in the pockets. Really easy to put on and comfortable and give a little extra oomph.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 December 2025
Verified Purchase

Move over Kim K

Yes, I recommend this

I laughed with surprise when I put these on. They really are incredibly convincing.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 December 2025lalala26
Verified Purchase

Do the job

Quite comfortable and do a fairly adequate job. Washed ok.

Helpful?

07 December 2025lurcher1
Verified Purchase

Happy!

Yes, I recommend this

These bum boosters are so comfortable to wear - I forget I have them on. I struggle to hold up my trousers/jeans, having a very flat ‘derrière’ but these improve the fit and create a much better silhouette. My dresses hang better too. They also wash well. I can thoroughly recommend - I’m thinking of buying more!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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