All Underwear - Knix (2024)

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All Underwear

From ultra-soft fabrics and seamless styles to super absorbent underwear, you’re covered 24/7/365.

HeavyUltraZeroTeen Underwear

Lightest Absorbency

Lightest periods, spotting, sweat & discharge - absorbs about 0.5-1 regular tampon worth.

SaleLeakproof Logo Rib Modal Boxer Brief $30.40 USD$38.0020% off Leakproof

SaleLight Leakproof No-Show High Rise $20.80 USD$26.0020% off Leakproof

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13

SaleLight Leakproof No-Show Bikini $17.60 USD$22.0020% off Leakproof

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19

SaleLight Leakproof No-Show Thong $16.00 USD$20.0020% off Leakproof

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11

SaleLight Leakproof No-Show Cheeky $17.60 USD$22.0020% off Leakproof

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1

SaleLight Leakproof No-Show Mesh Thong $16.00 USD$20.0020% off Leakproof

SaleLight Leakproof No-Show Boyshort $17.60 USD$22.0020% off Leakproof

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18

Light Absorbency

Light periods, backup protection & sweat - absorbs about 1-3 regular tampons’ worth.

SaleLeakproof Logo Rib Modal French Cut $22.40 USD$28.0020% off Leakproof

SaleLight Leakproof No-Show French Cut $19.20 USD$24.0020% off Leakproof

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16

SaleLeakproof UltraThin No-Show French Cut $21.60 USD$27.0020% off Leakproof

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7

SaleLight Leakproof UltraThin No-Show Thong $18.40 USD$23.0020% off Leakproof

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6

SaleLight Leakproof No-Show Mesh Boyshort $17.60 USD$22.0020% off Leakproof

SaleLight Leakproof Luxe Modal Bikini $17.60 USD$22.0020% off Leakproof

SaleLight Leakproof No-Show Mesh High Rise $20.80 USD$26.0020% off Leakproof

SaleLight Leakproof No-Show Mesh Bikini $17.60 USD$22.0020% off Leakproof

Medium Absorbency

Medium periods, light bladder leaks & sweat - absorbs about 2-3 super tampons’ worth.

SaleLeakproof UltraThin No-Show High Rise $23.20 USD$29.0020% off Leakproof

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8

SaleLeakproof UltraThin No-Show Bikini $20.00 USD$25.0020% off Leakproof

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7

SaleLeakproof No-Show Thong $21.60 USD$27.0020% off Leakproof

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12

SaleLeakproof UltraThin No-Show French Cut $21.60 USD$27.0020% off Leakproof

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7

SaleLeakproof Cotton Bikini $18.40 USD$23.0020% off Leakproof

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1

SaleLeakproof Cotton High Rise $21.60 USD$27.0020% off Leakproof

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1

Period protection

down to a science

Learn MoreTikTok

SaleLeakproof Cotton Boybrief $28.00 USD$35.0020% off Leakproof

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1

SaleLuxe Modal Leakproof Sleep Boxer $30.40 USD$38.0020% off Leakproof

SaleLeakproof Cotton Modal Bikini $23.20 USD$29.0020% off Leakproof

SaleLeakproof Corelove High Rise $30.40 USD$38.0020% off Leakproof

SaleLeakproof Cotton Modal High Rise $27.20 USD$34.0020% off Leakproof

Heavy Absorbency

Heavy periods, overnight protection & light bladder leaks - absorbs about 3-6 super tampons’ worth.

SaleSuper Leakproof® No-Show High Rise $27.20 USD$34.0020% off Leakproof

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7

SaleSuper Leakproof® No-Show French Cut $25.60 USD$32.0020% off Leakproof

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11

SaleSuper Leakproof® No-Show Boyshort $23.20 USD$29.0020% off Leakproof

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6

SaleSuper Leakproof® No-Show Bikini $23.20 USD$29.0020% off Leakproof

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4

SaleSuper Leakproof® Dream Short $33.60 USD$42.0020% off Leakproof

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3

SaleReusable Snap Leakproof Pads - Regular (3-Pack) $28.80 USD$36.0020% off Leakproof

Ultra Absorbency 💧💧💧💧

Extra heavy periods, overnight protection & light bladder leaks - absorbs about 7-9 super tampons’ worth.

SaleUltra Leakproof Zones+ Bikini $28.80 USD$36.0020% off Leakproof

SaleUltra Leakproof Zones+ High Rise $31.20 USD$39.0020% off Leakproof

SaleReusable Snap Leakproof Pads - Overnight (3-Pack) $32.00 USD$40.0020% off Leakproof

Zero Absorbency

Everyday wear with no leakproof protection - zero absorbency.

Essential No-Show Boyshort $20.00 USDSave up to 25%

Essential No-Show High Rise $24.00 USDSave up to 25%

Essential No-Show Thong $18.00 USDSave up to 25%

Essential No-Show Bikini $20.00 USDSave up to 25%

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4

SaleEssential Lace Bikini $10.00 USD$20.0050% off

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10

Essential No-Show French Cut $22.00 USDSave up to 25%

SaleEssential Lace Boyshort $14.00 USD$20.0030% off

Essential No-Show High Rise Thong $22.00 USDSave up to 25%

SaleEssential Lace Thong $9.00 USD$18.0050% off

SaleMicro Modal Essential Bikini $10.00 USD$20.0050% off
SaleEssential Cotton Modal Bikini $14.00 USD$20.0030% off

SaleEssential Lace High Rise $16.80 USD$24.0030% off

SaleEssential Cotton Modal High Rise $16.80 USD$24.0030% off

NewEssential No-Show Cheeky $20.00 USDUp to 60% on select colors

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2

SaleEssential Lace Bikini 3-Pack $30.00 USD$60.0050% off
SaleEssential Lace Bikini 3-Pack $30.00 USD$60.0050% off

SaleEssential SuperStretch Bikini 3-Pack $25.20 USD$36.0030% off

SaleEssential Lace Boyshort 3-Pack $30.00 USD$60.0050% off
Essential SuperStretch Boyshort 3-Pack $36.00 USD

NewHigh Rise Shaper Brief $45.00 USDSave up to 25%

Best SellerThigh Saver® 6” $36.00 USDBuy 3 Save 15%

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3

Shortie Thigh Saver® 4” $36.00 USDBuy 3 Save 15%

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2

Lace Thigh Saver® 6" $36.00 USDBuy 3 Save 15%

Luxe Modal Thigh Saver® 6" $36.00 USDBuy 3 Save 15%

Teen Period Underwear

Moisture-wicking, odor-crushing, life-changing leakproof undies.

SaleTeen Super Leakproof® Sleepover Short $31.20 USD$39.0020% off Leakproof

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1

SaleTeen Leakproof Luxe Modal Sleep Boxer $23.20 USD$29.0020% off Leakproof

SaleTeen Leakproof Thigh Saver® $30.40 USD$38.0020% off Leakproof

SaleTeen Leakproof UltraThin No-Show Bikini $17.60 USD$22.0020% off Leakproof

SaleTeen Leakproof UltraThin No-Show Boyshort $17.60 USD$22.0020% off Leakproof

SaleTeen Light Leakproof No-Show Bikini $15.20 USD$19.0020% off Leakproof

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8

SaleTeen Light Leakproof No-Show Boyshort $15.20 USD$19.0020% off Leakproof

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7

SaleTeen Light Leakproof No-Show High Rise $17.60 USD$22.0020% off Leakproof

SaleTeen Super Leakproof® No-Show Bikini $20.00 USD$25.0020% off Leakproof

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8

SaleTeen Super Leakproof® No-Show Boyshort $20.00 USD$25.0020% off Leakproof

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2

SaleTeen Super Leakproof® No-Show High Rise $22.40 USD$28.0020% off Leakproof

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3

SaleTeen Leakproof Cotton Bikini $16.00 USD$20.0020% off Leakproof

SaleTeen Cotton Super Leakproof Boxer Brief $28.00 USD$35.0020% off Leakproof
SaleTeen Reusable Snap Pads 3-Pack (Regular) $28.80 USD$36.0020% off Leakproof

SaleTeen Light Leakproof No-Show Bikini 3-Pack $45.60 USD$57.0020% off Leakproof

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2

SaleTeen Light Leakproof No-Show Boyshort 3-Pack $45.60 USD$57.0020% off Leakproof

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2

SaleTeen Super Leakproof® No-Show Bikini 3-Pack $67.20 USD$84.0020% off Leakproof

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1

SaleTeen Super Leakproof® No-Show Boyshort 3-Pack $60.00 USD$75.0020% off Leakproof

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1

SaleTeen Light Leakproof No-Show Bikini 2-Pack $30.40 USD$38.0020% off Leakproof

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1

SaleTeen Light Leakproof No-Show Boyshort 2-Pack $30.40 USD$38.0020% off Leakproof
SaleTeen Super Leakproof® No-Show Bikini 2-Pack $40.00 USD$50.0020% off Leakproof

SaleTeen Super Leakproof® No-Show Boyshort 2-Pack $40.00 USD$50.0020% off Leakproof

SaleTeen Leakproof UltraThin No-Show Bikini 3-Pack $52.80 USD$66.0020% off Leakproof

SaleTeen Leakproof UltraThin No-Show Boyshort 3-Pack $52.80 USD$66.0020% off

From ultra-soft fabrics and seamless styles to super absorbent underwear, you’re covered 24/7/365.

Shop by Silhouette

ThongArrow 2
High RiseArrow 2
BikiniArrow 2
BoyshortArrow 2

Your leakproof questions, answered.

Items purchased on sale between August 28, 2024-September 2, 2024 are exchange only.

What size am I? Great question! Check out our size guide to determine your best fit or book a Virtual Fitting.

Is Essential underwear leakproof? No. Our Essential Underwear does NOT contain our Leakproof technology and does not protect against leaks. That being said, our Essential Underwear is comfortable, practical and great for everyday wear.

Online Ordering

When I add an item to my cart, is it put on hold for me?
No, items are not reserved for you until your payment is processed and your confirmation number is received. We recommend shopping early (and having your sizing ready) in order to avoid disappointment.

What payment method options are available?
You’re able to use a variety of payments, including credit card, Knix gift cards, PayPal, AfterPay (USA), Sezzle (CAN) and accelerated checkout options.

Other Ordering Questions

Can I collect rewards points on my sale purchase?
Yes, purchases on knix.com and knix.ca are eligible to earn loyalty points.

Can I pay for my purchase using a Knix gift card?
Yes, you will be able to apply a Knix gift card towards your sale purchase.

Can I change or cancel my order?
Once an order is placed, we cannot guarantee any address or order changes. If you would like to change your order, please use the “chat” feature on our website or email info@knix.com as soon as possible.

knix.ca: Standard shipping is free on eligible orders over $100CAD*. Orders under $100CAD* are $12CAD for standard shipping. Orders delivering to NWT, Nunavut, and Yukon under $100CAD* are $20CAD for standard Canada shipping.

Free expedited shipping $150+

*After discounts, before shipping and taxes. Digital gift cards do not count towards the free shipping threshold.

knix.com: Standard shipping is free on eligible orders over $100USD*. Orders under $100USD* are $10USD for standard shipping. We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.

Free expedited shipping $100+*

*After discounts, before shipping and taxes

How long will it take before my order is shipped? Due to a high volume of orders, it can take up to 4 business days for your items to be processed and shipped.

Ultra

Extra heavy periods, overnight protection & light bladder leaks - absorbs about 13-17 tsp or 65-85 mL which is the equivalent of 7-9 super tampons’ worth.

Heavy

Heavy periods, overnight protection & light bladder leaks - absorbs about 6-11 tsp, 30-55 mL or the equivalent of 3-6 super tampons’ worth.

Medium

Medium periods, light bladder leaks & sweat - absorbs about 3-6 tsp, 15 -30 mL or the equivalent of 2-3 super tampons’ worth.

Light

Light periods, backup protection & sweat - absorbs about 1.5-3 tsp, 7.5-15 mL or the equivalent of 1-3 regular tampons’ worth.

Lightest

Lightest periods, spotting, sweat & discharge - absorbs about 1-1.5 tsp, 4-7.5 mL or the equivalent of 0.5-1 regular tampon worth.

Zero

Everyday wear with no leakproof protection - zero absorbency.

All Underwear - Knix (97)All Underwear - Knix (98)

More ways to feel unapologetically free

Find an amazing wireless bra to match your Undies. Plus explore our other products, all designed to make you feel so comfortable in your own skin.

Period UnderwearBRASEVERYDAY UNDERWEAR SLEEPWEAR ACTIVEWEARAPPARELShapewearMaternity

All Underwear - Knix (2024)

FAQs

What is the lawsuit with Knix? ›

The settlement benefits consumers who purchased Knix products between Jan. 1, 2020, and Dec. 31, 2022. According to the class action lawsuit, Knix period underwear products contain dangerous PFAS chemicals despite the manufacturer's marketing that the panties are free of toxic chemicals.

Do Knix underwear work for bladder leaks? ›

What Is the Best Thing to Wear for Incontinence? Leakproof Underwear is a great choice for those experiencing incontinence. For moderate incontinence, reach for a pair of Knix Leakproof Underwear, which can hold up to 8 tsp of liquid.

Why do my Knix underwear smell? ›

Odor may set in if period underwear is left lying around soiled and damp. So the biggest thing you can do to avoid odor is to wash them more quickly after wearing them. As previously covered, you can also choose to rinse them to immediately rid them of blood.

Do you wear Knix underwear all day? ›

At any given time, you probably have extra tampons, pads or panty-liners in your bag on the off-chance you might need them. It's for this reason people are always shocked when we tell them that period underwear is designed for everyday wear and meant to be worn all-day long!

What is the problem with Knix? ›

A class action complaint against the undergarment brand was filed in April, alleging the company's menstrual underwear are “unfit for their intended use” because they contain a harmful class of chemicals known as per- and polyfluoroalkyl substances (PFAS), sometimes nicknamed “forever chemicals”, despite being ...

Is Knix made in China? ›

Made of polyester, nylon, and spandex, this bra is a blended fabric that provides a seamless and supportive fit. The bra is adjustable, with a back closure and convertible features. It is part of the Knix Infinity product line and is made in China.

Can you wear Knix underwear without a pad? ›

Details. With the ability to hold about 3 super tampons' or 1.5 regular pads' worth of blood, this super-absorbent bikini underwear works just as hard as you do—no backup needed.

Can you wear Knix underwear in the water? ›

The layers in the gusset of the underwear work to trap and absorb your period so it doesn't leak in the water (or on land!) Our Swimwear features the same Leakproof Technology as our Period Underwear with an additional thin layer of waterproof material for extra protection.

What happens if you put Knix underwear in the dryer? ›

Unless it's our Super Leakproof or Cotton Modal Super Leakproof underwear, which are safe to tumble-dry on low. Otherwise, the heat and agitation of a typical dryer will break down the precious absorbent fibers in the fabric that make the underwear so great.

Do you wash Knix underwear or throw them away? ›

Knix Leakproof Underwear is as low maintenance as it gets. You simply machine wash them on a cold water cycle (aka gentle or delicate cycle), with mild detergent. You can was your period pants the other clothes. We advise against using bleach.

Can you sleep in Knix underwear? ›

The beauty is that, when you're sleeping, leaks are on the loose, so the extra inches in the width and length ensures you're covered from all angles, whether you're a really still sleeper, or one of those tornado types. 3. It's for sleep, but it works for day, too.

How many days in a row can you wear period underwear? ›

Some brands recommend changing period underwear every 12 hours to prevent odor or leakage. Feeling wetness or skin irritation or seeing blood on your clothes can indicate that you need to change the pair because the underwear has absorbed all it can.

How often should you buy all new underwear? ›

However, if your underwear is sporting holes, tears, or stains, it has no place in your knicker drawer, and it's most definitely time to be out with the old and in with the new. It would be best to replace your underwear every 6 to 12 months.

Who owns Knix? ›

Dive Brief: After signing a deal in July, Knix on Monday said its acquisition by Essity, an international health and hygiene brand, has closed. Essity acquired 80% of Knix's shares for $320 million, the company said in a press release.

Does Knix have harmful chemicals? ›

As part of that trust we are committed to doing everything we can to ensure that we do not intentionally use toxic or harmful chemicals in our products and to be open and honest about what, exactly, that promise means.

Is Knix an ethical company? ›

Knix's Ethical Supply Chain Guidelines prohibit forced and child labour by its suppliers. All suppliers are required to sign Knix's master supplier agreement and Ethical Supply Chain Guidelines. Knix engages a reputable, independent third-party to perform an annual social compliance audit of its suppliers.

How to join Knix class action lawsuit? ›

Claim Forms are available online at www.knixmarketingsettlement.com or by calling 1-877-392-0141. Plaintiffs maintain all of the allegations in their complaint, which is available for review at www.knixmarketingsettlement.com.

Who bought out Knix? ›

One of these is period underwear brand Knix, which sold a majority stake to health and hygiene product company Essity in September 2022 for $320 million.

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