Quality, condition, value and appearance 110%.,
These are the best! Teen daughter feels so confident wearing these swimmers. Safe and secure fit while the style is on trend. Love these.
How to make your daughter's first period EASY and FUN!CLICK HERE TO READ.
Welcome to Knicked, Welcome to Puberty and Periods SHOP HERE
Terms & Policies
Please see each product page, for individual sizing.
As a general rule, please choose the same size for our period undies and period swimwear as your child's regular underwear size.
Our period underwear is designed here using Australian Child/Youth underwear guidelines. It's important to note that child sizing, also crosses over into women's sizing at our 12/14, so we have also shown this on our sizing charts (on each individual product page) to assist.
We also understand purchasing online can make judging sizing difficult and everyone has a different body shape (literally hundreds of waist & hip combinations) so we have created guides on each product page to help you choose the best fit for each product, or feel free to email our helpful team at theteam@knicked.com.au with waist & hip measurements so we can assist further.
To measure against existing underwear: use the flat lay measurement (side seam to side seam on the waistband) to compare with their current underwear.
Don't panic if you do find you've ordered the wrong size, KNICKED will happily exchange sizing and also cover the postal costs to reship (once per order) as long as underwear has been tried on over clean underwear and returned in AS NEW condition (not washed/worn free of lint/hair/marks), and packaging in original condition.
Please click here for our Exchange/Refund Forms & Guidelines to organise an exchange.
Meet BFFs - Your Teen’s New "Bestie Flow Friend"
The world’s first 2-in-1 hybrid period undies that can be worn both in and out of water: pop them under your favourite bikini or one piece, leotard, leggings or underwear and live life without leaks, limits, or worries. Ditch the SOS period kit - BFFs are the total schoolbag essential to cover any period emergency.
Soft, Slimline but Seriously clever.
With our innovative stop-leak tech and comfy high-cut design, BFFs are made to block water from getting in and lock period flow from getting out- so your teen can dive in, dance, or chill out with total confidence.
BFFs are designed for nearly every activity, meaning fewer outfit changes, less stress, and more freedom, the ultimate SOS friend. If your daughter is awkward about wearing period undies, we've had mums tell us their daughters wear our BFFs under their regular underwear!
✨Why BFFs are the ultimate emergency pair your tween/teen shouldn't be without:
• wear under swimwear, leotards, leggings - you name it
• super discreet and ultra comfortable
• waterproof and leakproof both ways
• reusable, sustainable and budget friendly (savings of well over $80 alone when compared to purchasing period swimwear, dance and heavy flow underwear separately)
• Compliant with Swimming Australia's 'Inclusive Swimwear Policy'

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.
No leaks. No worries. No limits. Just freedom.

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.
Tracked postage is $9.95
Express postage is $14.50
Orders over $99 receive complimentary FREE REGULAR SHIPPING
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.
Quality, condition, value and appearance 110%.,
These are the best! Teen daughter feels so confident wearing these swimmers. Safe and secure fit while the style is on trend. Love these.
My daughter really liked it