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M&S

3pk Heavy Absorbency Period Bikini Knickers

£16

Colour

Sale items

Customers say:

Fits true to size()
Size

Free standard delivery over £60

Product code: T617322P

About this style

These cotton-rich period bikini knickers from M&S Collection provide heavy absorbency with a triple-layer gusset and leak-proof protection for your flow. The flattering low-rise waist offers a discreet, comfortable brief fit for everyday wear. Anti-odour technology helps maintain freshness throughout your day, while the highly absorbent pantie design and practical pack of three ensures you're always prepared. M&S Collection: Easy-to-wear wardrobe staples that combine classic and contemporary styles.

Details & care

Style

Low rise

Added Stretch

Composition

76% cotton, 14% polyamide and 10% elastane (exclusive of trimmings) , Gusset layer 1 - 58% polyester, 42% elastomultiester , Gusset layer 2 - 84% polyester, 16% polyamide , Gusset layer 3 - 100% polyester , Heavy absorbency

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 (35)

4.6

89% Recommended this product

Mentions
27 December 2025Wildfrost
Verified Purchase

Great quality

Yes, I recommend this

I have used these for a couple of years now and they are such a great, sustainable alternative to usual period products. I feel confident wearing them.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

26 December 2025Crinkuls1
Verified Purchase

Love them. Bought previously.

Yes, I recommend this

Love them. Have had them previously. Made mistake of ordering pink lace ones too, same size and style but as with my separate review, those are awful. Saggy baggy round the back/bum as they don’t have elastic on the join from gusset. Very disappointed with them hope I get a response.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 December 2025Lally57x
Verified Purchase

Keep Me Dry

Yes, I recommend this

Good Fit and Quality and keeps me dry during the day

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

21 December 2025Sw2122
Verified Purchase

Great

Yes, I recommend this

Comfy, absorbent, discreet do the job well. I sized up so did feel a bit bulky compared to normal underwear but pleased with them. Also used overnight and slept well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

19 December 2025Auntie Mag
Verified Purchase

Brilliant

Yes, I recommend this

Not just for periods! Effective for those little drips.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

16 December 2025Victoria587
Verified Purchase

Excellent!

Yes, I recommend this

These make night time periods so much more comfortable. Highly recommend! I've worn them for running too with no problem.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

15 December 2025AyJay53
Verified Purchase

Disappointed

No, I don't recommend this

Disappointed as the last ones I bought were great (sold for £20) these (£16) not as comfortable slightly different cut, leg elastic tight, and in bold white on knickers states "confidence underwear heavy" in white which is not very discreet - I just don't like wearing them - will go back to the all lace next time I buy

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

10 December 2025Somersetshire Gal
Verified Purchase

Comfortable and secure

Yes, I recommend this

Excellent product and comfortable for sleeping in rather than using bulky towels

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

19 November 2025Sheldon44
Verified Purchase

Excellent product

Yes, I recommend this

Excellent quality period underwear. Wash really well and my daughter says they are really comfortable. Wouldn’t go anywhere else for period pants!

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

09 November 2025MaudyGrunch
Verified Purchase

Good bye paper panty liners

Yes, I recommend this

These are terrific. The absorbent pad is large but not bulky and easy to rinse out. The panties are attractive, fit well, and worth trying. I have an overactive bladder and these catch those little leaks, they don’t smell, and are worth the price.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

09 November 2025Mar10gy
Verified Purchase

These are great

Yes, I recommend this

These are such a great idea, comfortable, leak free and re useable washing well

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

07 November 2025Mag92
Verified Purchase

Good period knickers

Yes, I recommend this

Really good period knickers, good fitting, very pleased, no leaks

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

05 November 2025Ellz97
Verified Purchase

Great!

Yes, I recommend this

This was my first time trying period underwear and it really is a game changer. So much more practical, comfortable and freeing. I'm really happy with these and for the price these are wonderful

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

03 November 2025Lulu212
Verified Purchase

I’m a period pants convert now

Yes, I recommend this

Worked all through my cycle. I am a period pants newbie - first time using these, and now I’m hooked. I love that they don’t get stained, they don’t leak, they are easy to wash and dry. I thought I needed to wear black only but the patterned ones do brighten up what is never a fun time of the month for any of us. I don’t like these high waisted ones as much because they can feel a bit strange around the waist - but that’s just me. I generally only find invisible hem line undies comfy if they are high waisted. I have the low waisted version and they are perfect for me.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 October 2025Julie Sp
Verified Purchase

Good quality

Yes, I recommend this

I bought these online, and they are so comfortable and wash really well.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

27 October 2025KarenH84
Verified Purchase

Good but small size

Yes, I recommend this

My first pair of period pants and im really impressed. Come up slightly small so id buy a size up. Apart from this they are great.

Reviewer Ratings

How did it fit?

Small

Helpful?

Reviewer Ratings

How did it fit?

Small

18 October 2025Cheesed off grannie
Verified Purchase

Sent back unopened

No, I don't recommend this

They were purchased for my granddaughter who changed her mind before they arrived

Helpful?

13 October 2025PluckyPen
Verified Purchase

Perfect protection

Yes, I recommend this

These are fantastic pants. I bought the black and leopard print 3 pair pack of bikini pants. I even bought a plunge bra to match. These are ideal for days when you may get small, light leaks. Knowing that you have that little bit of extra protection gave me so much more confidence. They also wash well.

Helpful?

12 October 2025kaykay212822
Verified Purchase

Pretty

Yes, I recommend this

Bought for my teen daughter she thinks they're pretty and work well

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

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