Knicked BFFs™ - Bestie Flow Friend
The World's First 2-in-1 Hybrid Period Undies
Swimming? Dancing? Unexpected period? School day?
We've got you covered.
Our Knicked BFFs™ are the ultimate SOS period solution - the world's first 2-in-1 hybrid period undies that work both in AND out of water. Wear them under your bikini, leotard, leggings, or even regular underwear for total leak-proof confidence anywhere, anytime.
💖 What Makes Them Different?
Unlike regular period underwear OR period swimwear, our BFFs feature:
✔ 2-in-1 hybrid design - works in water AND out of water
✔ Waterproof technology that blocks water from getting in
✔ Leak-proof protection that locks period flow from getting out
✔ High-cut, discreet design under any outfit
✔ Award-winning stop-leak technology
✔ Soft, slimline & seriously clever
✔ Compliant with Swimming Australia's Inclusive Swimwear Policy
That means one pair replaces period swimwear, dance undies AND heavy flow underwear - saving you over $80 and endless outfit changes.
🩰🏝️ Perfect For:
• Under swimwear at the pool or beach
• Under leotards for dance & gymnastics
• Under leggings, shorts & everyday clothes
• Emergency period protection at school
• Sleepovers & school camps
• Any activity where you need total confidence
🌿 The Ultimate Schoolbag Essential
Created by a mum, designed for real teen life.
Our BFFs are:
• Ultra discreet & comfortable
• Reusable & sustainable
• Budget-friendly (replaces 3+ products)
• Made to move with you
• Comes with a waterproof, odour-proof wet bag
Because periods shouldn't mean missing out on swimming, dancing, or living your best life.
Knicked period undies have always been and will continue to be FREE FROM NASTIES such as PUL'S (plastics) or PFAS (chemicals).

How to wear:
These aren't your average undies - pull them on, then up high at the sides so they sit snugly and low under the belly for the best protection.
Care tip:
Wash before first use. Each pair comes in a reusable, waterproof, and odour-proof wet bag – perfect for storing your BFFs in your bag or when they're wet, waiting for a wash. Less waste, more wow.
Size Chart

Our teen models are wearing a Teen 12/14 (adult 6 or 8).
Please use the flatlay measurements to compare to another brand or existing pair to select the correct fit and if between sizes or very tall we recommend sizing up.
Shipping
Tracked postage is $9.95
Express postage is $14.50
Orders over $99 receive complimentary FREE REGULAR SHIPPING
Exchange
Knicked will exchange item(s) that have not been washed, worn and are in AS NEW condition, we request you submit our Exchange Form within 14 days of receiving your product. Knicked will cover one new shipping cost as a gift to assist - please note: if purchased on sale or outside Australia item(s) can ONLY be returned for a gift voucher to repurchase a new size or style within 5yrs.