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M&S

3pk Heavy Absorbency Modal Period Bikini Knickers

£20

Colour

Customers say:

Fits true to size()
Size

Matching items: Full Cup T-shirt Bra A-E
Free standard delivery over £60

Product code: T617955P

About this style

These period bikini knickers are made from luxuriously soft, modal-rich fabric for ultimate comfort during your cycle. Featuring a low-rise waist, the three-pack offers reliable heavy absorbency with specially developed three-layer gussets that effectively draw moisture away. Flexifit™ technology ensures these M&S Collection knickers move with you, providing confidence and ease throughout the day. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Style

Low rise

Added Stretch

Features

Flexifit™ technology

moves with you for all-day comfort

Composition

89% modal, 11% elastane (exclusive of trimmings) , Gusset layer 1 - 58% polyester, 42% elastomultiester , Gusset layer 2 - 84% polyester, 16% polyamide , Gusset layer 3 - 100% polyester

Care

Wash at 40°C

Do not bleach

Do not tumble dry

Iron at low temperature

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 (27)

4.3

85% Recommended this product

Mentions
28 January 2026Katiecardigan
Verified Purchase

They do the job.

Yes, I recommend this

These are my favourite underwear. Stops any embarrassing issues from stress incontinence. For everyday living these cope with all eventualities for period days or stress incontinence. I use these if i know i am going to be busy all day or enjoying exercise. However, probably not sufficient for trampolining!!

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 January 2026Bozena11
Verified Purchase

Just what you need!

Yes, I recommend this

Something you need and really good value for money.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

21 January 2026Blondje
Verified Purchase

Not worn yet

Yes, I recommend this

Can’t comment on these as given to my daughter who suffers heavy periods, and she not worn them yet. They are quite thick and looks as if plenty of stretch . Thick gusset .

Helpful?

21 January 2026Mercy Dash
Verified Purchase

Not suitable for heavy flow but otherwise great.

Yes, I recommend this

These are great for light to normal flow but they unfortunately I put too much faith in them and they let me down by considerable leaking within 2 hours of wearing them with a heavy flow, having to make a dash for home to change. M&S and I have different ideas about what constitutes as a “heavy” flow.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 January 2026Christmas1225
Verified Purchase

Looks good

Yes, I recommend this

Have tried Mark's period pants before so i think these will be alright.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

08 January 2026cutadash
Verified Purchase

Good quality knicker

Yes, I recommend this

Very good product comfortable true to size.Just one criticism,i wish the main part of the knicker was of a more cotton construction.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 January 2026C T 4
Verified Purchase

Period pants for heavy flow

Yes, I recommend this

Exellent for heavy flow, very comfortable and smooth under clothes , ideal for day or night and especially when ‘waiting’ for period

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 December 2025Doyle
Verified Purchase

Ridiculous placement of a very long tag

Originally posted on marksandspencer.ie

No, I don't recommend this

The tag for these knickers are in the middle at the back and they are about 4 inches long. I tried cutting them off but it left an uncomfortable notch, so when I cut a little more I ended with a hole in the seam. Why would the tag not be on the side like every other pair of knickers in the world!!

Helpful?

12 December 2025Ruthiebabe52
Verified Purchase

Great Pants

Yes, I recommend this

Love these bikini pants they are so good if you have an accident have about 9 pairs of them now wash up well

Helpful?

04 December 2025Nanna20
Verified Purchase

Modern girls

Yes, I recommend this

My granddaughter requested these second order. They give her confidence at school when she has her period and access to toilets are limited.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 November 2025Ellen reveals
Verified Purchase

Work as advertised. I am a convert to period pants

Yes, I recommend this

Comfortable, wash easy and dry quickly. I have confidence in the absorption.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 November 2025Sab4646
Verified Purchase

Terrible absorbency

No, I don't recommend this

I am so disappointed in these! I bought three packs after reading a review in a newspaper and these came out on top. I do not have a heavy flow and these leaked at a ridiculous rate. I need to find out if I can have a refund. What a waste of money.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 November 2025Gill606
Verified Purchase

As described

Yes, I recommend this

Good. Nice material. Works well. Fits okay. Black high leg size 16

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 November 2025L879654
Verified Purchase

Great But

Yes, I recommend this

I love this product and actually wear it every day - not just for period. As a women of a certain age gives me the confidence to just carry on.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

30 October 2025AnamikaV
Verified Purchase

best product ever

Yes, I recommend this

Best n essential Period product. I am using for both me n my daughter.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

28 October 2025Amy Draw
Verified Purchase

Comfy and absorbent

Yes, I recommend this

Good absorbency and really comfy. There's not much of a VPL like with other period pants.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

22 October 2025TPearson
Verified Purchase

Works well decent absorbency

Yes, I recommend this

Good absorbency for light to medium flow, not had heavy yet. I’d like the main pant to be in natural materials

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

10 October 2025Nisss
Verified Purchase

good quality

Yes, I recommend this

amazing has really changed things and made periods a lot more comfortable for me after struggling with pad rash for years

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 October 2025Teeann
Verified Purchase

Comfy but not entirely leakproof

No, I don't recommend this

Comfortable to wear but I did have leakage at the sides. They didn’t stand up to their ‘heavy absorbency’ label

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 September 2025AdrienneMorgan
Verified Purchase

Brilliant. Forget your pads.

Yes, I recommend this

Brilliant at preventing occasional stress incontinence

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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