Knix
Leak-proof period underwear that looks and feels like regular lingerie
The Brand That Made Period Underwear Something You Actually Want to Wear
Knix was founded in 2013 by Joanna Griffiths in Toronto, Canada, after she conducted extensive research into the intimate apparel needs that the industry was failing to address. What she discovered was that millions of women were dealing with light bladder leaks and period flow using products designed decades ago — pads, liners, and period underwear that was bulky, uncomfortable, and visible under clothing. Griffiths launched Knix on Kickstarter with leak-proof underwear that looked and felt like regular, attractive lingerie, raising over half a million dollars in her initial campaign. The brand has since grown into one of Canada's most successful direct-to-consumer companies, expanding well beyond period underwear into a full intimate apparel line.
What Makes Knix Different
Knix's core innovation is their proprietary Leakproof Technology — a multi-layer fabric system built into the gusset of otherwise normal-looking underwear that can absorb up to eight teaspoons of liquid without feeling wet, bulky, or detectable under clothing. But what truly differentiates Knix is that they refused to let function compromise aesthetics. Their leak-proof underwear comes in thongs, bikinis, boyshorts, and high-waisted styles — silhouettes that look identical to regular underwear. The brand has expanded this philosophy to bras, swimwear, and activewear, always starting with the question: how do we solve a real problem without making women sacrifice how they look or feel?
Key Product Lines
Leakproof Underwear remains the foundation — available in every cut from thong to super high-rise, in absorbency levels from light to super. Dream Bra is their wireless everyday bra that has earned a devoted following independent of the leakproof technology. Good to Go Pads brought the brand into reusable period products. Catalyst Sports Bra provides high-impact support for large busts up to a G cup. Swim features leak-proof swimwear for worry-free beach and pool days. Leakproof Sleepwear ensures protection during overnight hours.
Who Knix Is Best For
Knix serves multiple audiences united by a common need: reliable, invisible protection. The brand is essential for women managing periods, postpartum bleeding, light bladder leaks, or simply the peace of mind that comes from backup protection on uncertain days. It is also increasingly chosen by women who want to reduce their use of disposable period products for environmental reasons. Beyond the leakproof technology, Knix has earned a broader following among women who simply appreciate well-designed, comfortable intimates at fair prices.
Price Range
Leakproof underwear from $22 to $42, bras from $48 to $72, swimwear from $55 to $85, activewear from $45 to $78. Mid-tier pricing makes the technology accessible, and when measured against the cost of disposable period products over time, the investment pays for itself within months.