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Get all the period protection you need with Knix leakproof underwear kits. Find your perfect assortment of absorbent, comfortable, and machine-washable underwear, and enjoy worry-free protection no matter how heavy your flow.

Leakproof 4-Packs Leakproof 5-Packs Everyday 4-Packs Teen 3-Packs Teen 6-Packs

Leakproof 4-Packs

Leakproof 5-Packs

Sale

Heavy Period Kit - Bikini

From $123.20 CAD

30% off

Color:

Sale

Heavy Period Kit - High Rise

From $134.40 CAD

30% off

Color:

Sale

Mixed Period Kit - Bikini

From $113.40 CAD

30% off

Color:

Sale

Mixed Period Kit - Boyshort

From $113.40 CAD

30% off

Color:

Sale

Day & Night Kit - High Rise

From $114.80 CAD

30% off

Color:

Sale

Day & Night Period Kit - Bikini

From $103.60 CAD

30% off

Color:

Everyday 4-Packs

Teen 3-Packs

Sale

Teen Starter 4-Pack - Bikini

From $100.10 CAD

30% off

Color:

Sale

Teen Starter 4-Pack - Boyshort

From $100.10 CAD

30% off

Color:

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Black

BlackNight Sky/Beige/BlackRuby/Sugar Plum/PosyNight Sky/Limeade/Heather Grey

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$39.00 CAD

$66.00

30-40% off

Color: Raspberry/Green Monster/Pink, limited edition

Raspberry/Green Monster/PinkBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Black

BlackNight Sky/Beige/BlackBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$39.00 CAD

$66.00

30-40% off

Color: Lucky Star/Berry/Cosmo, limited edition

Lucky Star/Berry/CosmoBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$39.00 CAD

$66.00

30-40% off

Color: Lucky Star/Berry/Cosmo, limited edition

Lucky Star/Berry/CosmoBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$52.20 CAD

$87.00

30-40% off

Color: Lucky Star/Berry/Cosmo, limited edition

Lucky Star/Berry/CosmoBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack

$60.90 CAD

$87.00

30% off

Color: Black

BlackNight Sky/Beige/BlackGumdrop/Blueberry/BlackEnergize/Marina/Highlight

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$60.90 CAD

$87.00

30-40% off

Color: Black

BlackNight Sky/Beige/BlackGumdrop/Blueberry/BlackLucky Star/Berry/Cosmo

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Lemon Sorbet/Ballet Pink/Lemonade, limited edition

Lemon Sorbet/Ballet Pink/LemonadeBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$39.00 CAD

$66.00

30-40% off

Color: Night Sky/Limeade/Heather Grey, limited edition

Night Sky/Limeade/Heather GreyBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Lemon Sorbet/Ballet Pink/Lemonade, limited edition

Lemon Sorbet/Ballet Pink/LemonadeBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$39.00 CAD

$66.00

30-40% off

Color: Night Sky/Limeade/Heather Grey, limited edition

Night Sky/Limeade/Heather GreyBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$39.00 CAD

$75.00

30-45% off

Color: Night Sky/Limeade/Heather Grey, limited edition

Night Sky/Limeade/Heather GreyBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Guava/Festival Blue/Perfect Pear, limited edition

Guava/Festival Blue/Perfect PearBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Gumdrop/Blueberry/Blue Gingham, limited edition

Gumdrop/Blueberry/Blue GinghamBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Lemon Sorbet/Ballet Pink/Lemonade, limited edition

Lemon Sorbet/Ballet Pink/LemonadeBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Gumdrop/Blueberry/Blue Gingham, limited edition

Gumdrop/Blueberry/Blue GinghamBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Night Sky/Limeade/Heather Grey, limited edition

Night Sky/Limeade/Heather GreyBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$60.90 CAD

$87.00

30-40% off

Color: Gumdrop/Blueberry/Black, limited edition

Gumdrop/Blueberry/BlackBlackNight Sky/Beige/BlackLucky Star/Berry/Cosmo

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack

$60.90 CAD

$87.00

30% off

Color: Gumdrop/Blueberry/Black, limited edition

Gumdrop/Blueberry/BlackBlackNight Sky/Beige/BlackEnergize/Marina/Highlight

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Ruby/Sugar Plum/Posy, limited edition

Ruby/Sugar Plum/PosyBlackBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Blueberry/Holly/Galaxy, limited edition

Blueberry/Holly/GalaxyBlackRuby/Sugar Plum/PosyNight Sky/Limeade/Heather Grey

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Blueberry/Holly/Galaxy, limited edition

Blueberry/Holly/GalaxyBlackNight Sky/Beige/BlackNight Sky/Limeade/Heather Grey

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Ruby/Sugar Plum/Posy, limited edition

Ruby/Sugar Plum/PosyBlackNight Sky/Beige/BlackNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Black

BlackRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Black

BlackRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Blueberry/Holly/Galaxy, limited edition

Blueberry/Holly/GalaxyBlackRuby/Sugar Plum/PosyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Ruby/Sugar Plum/Posy, limited edition

Ruby/Sugar Plum/PosyBlackBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$52.50 CAD

$75.00

30-45% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$52.50 CAD

$75.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackRuby/Sugar Plum/PosyBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack

$46.20 CAD

$66.00

30-40% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$60.90 CAD

$87.00

30-40% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$60.90 CAD

$87.00

30-40% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack

$60.90 CAD

$87.00

30-40% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack

$60.90 CAD

$87.00

30% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack

$60.90 CAD

$87.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack

$60.90 CAD

$87.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack - Kit

$52.50 CAD

$75.00

30% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack - Kit

$52.50 CAD

$75.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Boyshort 3-Pack - Kit

$52.50 CAD

$75.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyNight Sky/Limeade/Heather Grey

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack - Kit

$52.50 CAD

$75.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyLemon Sorbet/Ballet Pink/Lemonade

Sale

Teen Leakproof UltraThin No-Show Bikini 3-Pack - Kit

$52.50 CAD

$75.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightRuby/Sugar Plum/PosyBlueberry/Holly/GalaxyLemon Sorbet/Ballet Pink/Lemonade

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Bikini 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Super Leakproof® No-Show Boyshort 3-Pack - Kit

$60.90 CAD

$87.00

30% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackGumdrop/Blueberry/Black

Sale

Teen Light Leakproof No-Show Bikini 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Bikini 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackBlueberry/Holly/Galaxy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Electric Orchid/Teal Appeal/Lagoon, limited edition

Electric Orchid/Teal Appeal/LagoonBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Energize/Marina/Highlight, limited edition

Energize/Marina/HighlightBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy

Sale

Teen Light Leakproof No-Show Boyshort 3-Pack - Kit

$46.20 CAD

$66.00

29% off

Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition

Picnic Plaid/Cosmo/Ultra VioletBlackNight Sky/Beige/BlackRuby/Sugar Plum/Posy