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Firm Control Secret Slimming™ Full Slip

Product code: T325931A

About this style

Sculpt your silhouette with this Secret Slimming™ full slip shapewear. The innovative microfibre fabric provides firm control to shape your body, tummy, waist and hips while remaining lightweight and comfortable. A regular fit that sits just above the knee offers complete coverage, with no visible knicker lines to disrupt your outfit. Pull-on styling and non-wired support make this M&S Collection lingerie undergarment effortlessly practical for everyday use. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Please don’t worry if the packaging name looks a little different, it’s still the same colour, our packaging just takes a little longer to update. Opaline formerly known as Almond.

Details & care

Item details

Product Length: Short

Style

Pull on

Non padded

Control: Firm control

Features

Your secret to staying cool all day is Cool Comfort™

Composition

63% polyamide, 37% elastane (exclusive of trimmings)

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Do not iron

Do not dry clean

M&S

Firm Control Secret Slimming™ Full Slip

€38

Colour

Size

Free standard delivery over €75

Reviews (403)

4.0

59% Recommended this product

Mentions
15 July 2026Liz 65

Firm control petticoat

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

I was a little disappointed in the petticoat as I felt it could have been a bit longer.

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 July 2026Supernan7

Full slip

Originally posted on marksandspencer.com (UK)

This is perfect for smoothing out lumps and bumps. Great for under summer dresses. Feels comfortable to wear.

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

05 July 2026Firm control

The quality is good

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

The quality is good the only problem is not really staying in place as I’m working it slinding al the way up

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

04 July 2026Tiarmarie

Ok but could be better

Originally posted on marksandspencer.com (UK)

What's petticoat is not as good as what Marks and Spencers used to sell it could be a lot longer it could fit the body shape better it could be higher at the back and front or around the neck.. nothing is as good as what it used to be

Reviewer Ratings

How do you feel about the size?

Small

Helpful?

Reviewer Ratings

How do you feel about the size?

Small

28 May 2026luverlylelly

Good quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Bought this to replace one. Good quality and does the job

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

27 May 2026ALY45

Form hugging

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Full control and delivers a good overall shape. Manages to flatten and sculpt problematic areas.

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 May 2026Ja456

Smooth and comfortable

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Perfect for smooth lines while wearing my MOG dress

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 2026Shoppingdiva50

Good quality but large straps which are visible

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Good product, does slim the body well. Would be even better if the straps were narrower at front. Does show under the dress it was bought for which is disappointing! So will need to look for something else.

Reviewer Ratings

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit small

16 April 2026Ravel3

Exactly as expected

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

It fits nicely and I bought it for specific dress.

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

09 April 2026Jones the Garden

Poor condition

Originally posted on marksandspencer.com (UK)

The garment works well, but it arrived on a hanger belonging to another garment, inside out, and clearly worn before.

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

04 April 2026Mrs Cliffe

LOVE THEM !!!

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

This is my second body shape slip in a different colour and I love them. They give you a great figure and there are no lines showing through your clothes.

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

28 March 2026V H P 5

Worth buying

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Exactly what I needed to make an outfit look smoother.

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 March 2026Unh1ppy custom3r

Poor!

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Bring back the wear your own bra slip! This material is not supporting anything at all.

Reviewer Ratings

How do you feel about the size?

Large

Helpful?

Reviewer Ratings

How do you feel about the size?

Large

16 March 2026cardoo

firm control full slip

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Compared to the previous ones of this item, the quality is absolutely terrible. The fabric in the bodice area is so flimsy, and the skirt very thin compared to my previous purchases of this item. I have had to keep it, as after years of good service my older ones have had their day. I know this new cheaper quality version will not stand the test of time. When i say cheaper quality that is what it is. Made cheaply. However very expensive to buy for poor quality. I will be looking elsewhere for a similar slip.

Reviewer Ratings

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit small

13 March 2026Deb 2907

Slimming full slip

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

I lost 3 st 5lb and I have got loose skin, wearing this under my dress is much better, and it makes me feel more confident

Reviewer Ratings

How do you feel about the size?

A bit small

Helpful?

Reviewer Ratings

How do you feel about the size?

A bit small

03 March 2026Happy swim

Does the job!

Originally posted on marksandspencer.com (UK)

Usually a size 10 overall but 12 on top. Opted for size 12 and does the job perfectly. Step into it… you won’t get it over your head. Doesn’t ride up.

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 February 2026Jackie1alex

Not for me

Originally posted on marksandspencer.com (UK)

No, I don't recommend this

Sizing way off and not flattering. Sadly returned.

Helpful?

09 February 2026Beechtree

Quality

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great product, gives such lovely smooth sleek shape, it’s so comfy too, 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

23 December 2025Tellitlikeiti5

Tellitlikeitis

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Great fit and did what it's meant to. I felt great in my fitted party dress!

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

20 December 2025Col23

Just what I needed

Originally posted on marksandspencer.com (UK)

Yes, I recommend this

Does the job, was comfy to wear under my Christmas dress

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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