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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.

M&S

Firm Control Secret Slimming™ Full Slip

£29.50

Colour

Customers say:

Fits true to size()
Size

Free standard delivery over £60

Reviews (375)

4.0

59% Recommended this product

Mentions
16 March 2026cardoo
Verified Purchase

firm control full slip

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 did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

13 March 2026Deb 2907
Verified Purchase

Slimming full slip

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 did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

03 March 2026Happy swim
Verified Purchase

Does the job!

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 did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 February 2026Jackie1alex
Verified Purchase

Not for me

No, I don't recommend this

Sizing way off and not flattering. Sadly returned.

Helpful?

09 February 2026Beechtree
Verified Purchase

Quality

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

23 December 2025Tellitlikeiti5
Verified Purchase

Tellitlikeitis

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

20 December 2025Col23
Verified Purchase

Just what I needed

Yes, I recommend this

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

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 December 2025spital
Verified Purchase

Excellent goods

Really pleased with this. Excellent service as always. Keep doing what you’re doing.

Helpful?

22 November 2025Happy 60
Verified Purchase

Happy 60

Yes, I recommend this

Comfortable on nice length good for the money.....

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

02 November 2025Sleepwell106
Verified Purchase

Good quality garment

Very tight to get on. Had to pull it upwards not down

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

28 October 2025Supersweet
Verified Purchase

Rides up terribly!

I had high hopes of this. I sized up ( as I usually do with shapewear) so went up to a size 16, normally a 12-14. Tried it on and it gave me a great smooth silhouette. Put my jersey dress on and I felt great. It smoothed across my back, stomach and tops of my thighs and gave me a lovely toned look in my dress and was comfortable. However on wearing it in the real world and walking a few paces I found it just kept riding up. So much so that I was aware that the skirt part was up around my buttocks under my dress.Quite embarrassing So disappointed. No way would this stand up to an evening out unless you didn’t move. It wouldn’t hold up to dancing. The only way of solving it would be to go up two sizes and then there would be no benefit from the shapewear aspects. Terribly dissapointed. The one I’d ordered in another colour has gone straight back. Unless you are prepared to keep sticking your hand up your skirt and pulling it down or are just sitting down and not walking at all, sadly I would give it a miss.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

23 October 2025princessarand
Verified Purchase

Does the job but boobs disappear!

Yes, I recommend this

Really gives a lovely shadow for wearing dresses if fitted items of clothing. I don’t find it overly ‘firm’ control but it does give a smooth silhouette. But it does also flatten your boobs and not in an uncomfortable way but the curves disappear!

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

06 October 2025Amlucas
Verified Purchase

Fits well

fits well, difficult to take of due to snugness of fit. Otherwise happy with product

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 October 2025katzh
Verified Purchase

GREAT PRODUCT AT A GREAT PRICE!! Easy to wear.

Yes, I recommend this

GREAT PRODUCT AT A GREAT PRICE!! Easy to wear, versatile.

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

28 September 2025AndewsJones
Verified Purchase

Perfect for the job

Yes, I recommend this

Believe it or not, I brought this full slip for my 87 year old mother who is very thin but has a hernia, this garment was a gamble but it worked wonders for her, supporting the hernia without wearing a belt. ☺️

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

13 April 202555Abbey
Verified Purchase

Useful slip

Yes, I recommend this

For me it is not particularly slimming, but I just wanted something to wear under a lace dress that is slightly transparent and this ticks the box. I am hoping it does not ride up, but as yet I have not worn it so can't comment.

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Good

How did it fit?

A bit small

Helpful?

Reviewer Ratings

Quality

Good

Value for Money

Good

Style

Good

How did it fit?

A bit small

11 April 2025CraftyJane1
Verified Purchase

Nice quality but didn’t work

Not easy to get on and didn’t give a smooth finish. Disappointing as M&S are my Go To for all things lingerie.

Reviewer Ratings

Style

Fair

How did it fit?

True to size

Helpful?

Reviewer Ratings

Style

Fair

How did it fit?

True to size

12 March 2025Kathryn 59
Verified Purchase

Good wardrobe staple

Yes, I recommend this

Excellent slip, great value and a must in any girl’s wardrobe

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

How did it fit?

True to size

03 March 2025Giddyup12
Verified Purchase

Poor Product :(

No, I don't recommend this

Wore for just over an hour, the skirt part constantly rode up, at £30 this isn't acceptable so returned to store, given refund, should of read reviews before purchasing.

Reviewer Ratings

Quality

Poor

Value for Money

Poor

Style

Poor

How did it fit?

A bit small

Helpful?

Reviewer Ratings

Quality

Poor

Value for Money

Poor

Style

Poor

How did it fit?

A bit small

22 February 2025Patsy11130
Verified Purchase

Good overall.

Yes, I recommend this

Ideal to wear under a dress and feel slimmer! looks and feels great.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How did it fit?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Average

How did it fit?

A bit small

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