The Birthday Sale

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It’s our birthday and everything’s on sale. Shop Period Undies, Swim and Active, all at 30% off. 

OVERNIGHT PROTECTION
  • Black
Super Leakproof™ Sleepover Short
Heavy Absorbency
$45 CAD
  • Beige
Super Leakproof® No-Show Underwear Bikini
Heavy Absorbency
$29 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Black
Light Leakproof No-Show Underwear Bikini
Lightest Absorbency
$22 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Shady Blue
Super Leakproof® No-Show Underwear Boyshort
Heavy Absorbency
$29 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Black
Light Leakproof No-Show Underwear Boyshort
Lightest Absorbency
$22 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Shady Blue
Super Leakproof® No-Show Underwear Boyshort
Heavy Absorbency
$29 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
New
  • Black
Leakproof Thigh Saver®
Light Absorbency
$42 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
New
  • Black
Leakproof Cotton Underwear Bikini
Medium Absorbency
$23 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
New
  • Black
Leakproof UltraThin No-Show Underwear Bikini
Medium Absorbency
$25 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
New
  • Black
Leakproof UltraThin No-Show Underwear Boyshort
Medium Absorbency
$25 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Berry
Leakproof Cotton Modal Underwear Bikini
Medium Absorbency
$29 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
WIDEST BUILT-IN LINER
  • Black
Leakproof Front-to-Back Liner Underwear Bikini
Medium Absorbency
$40 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Black
Light Leakproof No-Show Underwear High Rise
Lightest Absorbency
$26 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
  • Black
Super Leakproof® No-Show Underwear High Rise
Heavy Absorbency
$32 CAD Buy 4+ Save 15%, Buy 7+ Save 25%
Great for a Whole Cycle
First Period Kit
Light - Heavy Absorbency
-
$182.25 CAD $243 CAD Save $63
Great for Heavy Flows
Heavy Flow Period Kit
Heavy Absorbency
-
$177.75 CAD $237 CAD Save $59
Great for a Whole Cycle
Best Sellers Period Kit (Limited Edition)
Light - Heavy Absorbency
-
$128.35 CAD $151 CAD Save $22
Great for Light Flows
Everyday Leakproof Kit
Light Absorbency
$115.50 CAD $154 CAD Save $38
  • Black
Light Leakproof No-Show Underwear Boyshort 3-Pack
Light Absorbency
$66 CAD
  • Black
Light Leakproof No-Show Underwear Bikini 3-Pack
Light Absorbency
$66 CAD
  • Black
Super Leakproof® No-Show Underwear Bikini 3-Pack
Heavy Absorbency
$87 CAD
  • Black
Super Leakproof® No-Show Underwear Boyshort 3-Pack
Heavy Absorbency
$87 CAD
  • Black
Period Swim Sport One-Piece
Light Absorbency
$99 CAD
MAXIMUM BUM COVERAGE
  • Black
Period Swim Short
Light Absorbency
$60 CAD Mix & Match, Save 10%
New
  • Black
Period Swim Short - Long
Light Absorbency
$60 CAD Mix & Match, Save 10%
New
  • Black
Teen Period Swim Board Shorts
Light Absorbency
$55 CAD Mix & Match, Save 10%
  • Black
Period Swim Twist High Rise Bikini Bottom
Light Absorbency
$59 CAD Mix & Match, Save 10%
  • Black
Period Swim Square Neck One-Piece
Light Absorbency
$99 CAD
  • Black
Period Swim Bikini Bottom
Light Absorbency
$55 CAD Mix & Match, Save 10%
  • Black
Period Swim Full-Coverage Bikini Bottom
Light Absorbency
$55 CAD Mix & Match, Save 10%
  • Black
Period Swim Freestyle One-Piece
Light Absorbency
$99 CAD
  • Black
Double Scoop Bikini Top
$55 CAD Mix & Match, Save 10%
New
  • Black
Racerback Tankini Top
$55 CAD Mix & Match, Save 10%
  • Black
Triangle Bikini Top
$55 CAD Mix & Match, Save 10%
  • Atmosphere
Leakproof Active Legging
Heavy Absorbency
$90 CAD
  • Black
Leakproof Tights
Light Absorbency
$20 CAD
  • Black
Leakproof Leotard
Light Absorbency
Sold Out $60 CAD
  • Black
Reusable Pads 3-Pack (Overnight)
Ultra Absorbency
$48 CAD
  • Black
Reusable Pads 3-Pack (Regular)
Ultra Absorbency
$44 CAD
  • Natura/Brown
Reusable Pads 3-Pack in Natura (Extra-Long)
Heavy Absorbency
$54 CAD
  • Natura/Brown
Reusable Pads 3-Pack in Natura (Regular)
Heavy Absorbency
$48 CAD
  • Natura/Brown
Reusable Pads 3-Pack in Natura (Short)
Heavy Absorbency
$44 CAD
HOLDS UP TO 7 PAIRS
  • Black
Travel Bag
$20 CAD
nothing is tmi here—we promise.
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Exclusions apply. Offer valid from Wednesday, May 8th 9:00am to Monday, May 13 at 11:59pm EST. Applies only to in-stock items and cannot be extended after the listed date. No price adjustments for previous orders. Cannot be combined with any other discount offers. No rain checks.  Contact your local store for collection availability. 

For items with a 20% or more discount you may exchange for another item or store credit within 30 days of delivery. No refunds.

Knix store locations include: Toronto Queen St, Sherway Gardens, Toronto Premium Outlet, Ottawa Westboro, Ottawa Rideau Centre, Vancouver - West 4th, Vancouver - Robson,  Calgary Mission, Calgary Market Mall, Winnipeg Polo Park, Edmonton Southgate, Richmond Centre

Free Shipping available on orders over $80+ CAD before tax and after discounts and applies to shipping addresses within Canada.


Each pair has a built-in liner that absorbs period blood. Kt Period Underwear is categorized by lightest, medium and heavy flows so you can find the right pair for your teen’s needs.

All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in. Liner’s are discreet and comfortable, and fit for your teen’s unique flow.