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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 (20)

4.7

90% Recommended this product

Mentions
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

09 October 2025Floofsicle
Verified Purchase

Perfect for Perimenopause!

Yes, I recommend this

Love these!!! You can tell you’re wearing them, but they’re very comfortable and look just like normal underwear (not that anyone’s likely to notice!). They keep me dry and clean, and genuinely wick away moisture. As someone who’s perimenopausal with unpredictable periods, they’re perfect for days when I might be due, comfortable enough to wear anytime.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

06 October 2025MissTW
Verified Purchase

Recommended!

Yes, I recommend this

Really good product. Have been using these for some time. Good value and washes well

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

01 October 2025Sharpette
Verified Purchase

Period changing!

Yes, I recommend this

These pants are so comfortable and look much prettier than other period knickers.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

29 September 2025HoneyMoore
Verified Purchase

Amazing product, have transformed my cyle

Yes, I recommend this

I love this product and have recommended it to friends and sisters. They have totally transformed my night routine on my period. No more laying on towel or worrying about the sheets. They give me freedom and peace of mind

Reviewer Ratings

How did it fit?

A bit small

Helpful?

Reviewer Ratings

How did it fit?

A bit small

27 September 2025LEFM
Verified Purchase

Great value and work well

Yes, I recommend this

Bought for my teenage daughter, who normally wears the well know branded version, as spare pairs to take on holiday. These work just as well as her branded version, but at a fraction of the price. Highly recommended and will definitely be buying more of these.

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

25 September 2025AdrienneMorgan
Verified Purchase

No need for 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

22 September 2025Lula33
Verified Purchase

Ok but bought better

No, I don't recommend this

Fine but not as absorbent as I’d have liked , can’t wear them on there own

Reviewer Ratings

How did it fit?

True to size

Helpful?

Reviewer Ratings

How did it fit?

True to size

18 April 2025Nicole2563
Verified Purchase

Period knicker convert

Yes, I recommend this

I’d never used period knickers before and wasn’t sure whether to trust them, but these had such good reviews, which were right. They are so comfortable and I even wore them to bed without any trouble. I got a heavy absorbency to hopefully safeguard against any issues and that was great. Truly converted and telling every woman I know to get some! Such good value from M&S too and easy to wash without fabric conditioner. Happy to have plastic-free periods going forward!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

A bit small

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

A bit small

17 April 2025Evelina1980
Verified Purchase

Very useful underwear

Yes, I recommend this

Great practical underwear for moderate heaviness period

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

14 April 2025KathB22
Verified Purchase

Brilliant, reliable period knickers!

Yes, I recommend this

I bought these recently for my daughter. The knickers are great. They are reliable, comfy and look good too. I bought size 4 for my slim 11 year old daughter and they fit perfectly. In fact, I bought 3 sets!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

22 March 2025Pink1982
Verified Purchase

Great period knickers

Yes, I recommend this

These period knickers are great. Does what they claim to do and I’m happy with them.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

21 March 2025Kent Mum 123
Verified Purchase

Highly rated by teens - praise indeed...

Yes, I recommend this

Bought for my teenager daughters who have rated these superior to other, more expensive, brands. Recommending to all my friends now - these work.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

18 March 2025Aimee2025
Verified Purchase

perfect!

Yes, I recommend this

Will always use these now! Absolute game changer. And an absolute bonus that they are fairly priced!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

01 March 2025P123B
Verified Purchase

Brilliant!

Yes, I recommend this

Brilliant - feel like regular knickers. Good absorbency. Much better than other brands I’ve tried.

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Excellent

Comfort

Excellent

How did it fit?

True to size

22 February 2025VickiM12345
Verified Purchase

Absolute game changer

Yes, I recommend this

I’ve been skiing and was so anxious about heavy flow and no quick access to the toilets. These knickers are soft, comfortable and very discrete way to remove this stress. Highly recommend!

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

Helpful?

Reviewer Ratings

Quality

Excellent

Value for Money

Excellent

Style

Good

Comfort

Excellent

How did it fit?

True to size

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