Knix, the Toronto-based company launched in 2013 is one of the top brands of Canadian period underwear. They introduce leakproof Underwear to the world to protect you through your heaviest days and nights. Knix Underwear can be worn for at least 8-12 hours as they absorb up to 6-10 tsp of liquid including period blood, sweat, and bladder leaks. They are available in all the classic Knix silhouettes including Bikini, Boyshort, Cheeky, High Rise, and Thong. Knix also makes amazing wireless bras, period-proof underwear, sports bras, loungewear, and more in sizes S to XXXXL.Â