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Home / Bikini Underwear / Super Leakproof® No-Show Bikini
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Super Leakproof® No-Show Bikini

$29.00 USD

Mix & Match: 3+ for $25 each
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Absorbs about 6 super tampons

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Invisible under clothes

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Extended gusset for extra protection

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Machine washable

Ashley has 39” hips and wears KNIX S | Warm Sand

Ashley has 39” hips and wears KNIX S

| Warm Sand
Ashley has 39” hips and wears KNIX S | Warm Sand

Ashley has 39” hips and wears KNIX S

Ashley has 39” hips and wears KNIX S | Warm Sand

Ashley has 39” hips and wears KNIX S

| General
Super Leakproof® No-Show Bikini | General

Super Leakproof® No-Show Bikini

Ashley has 39” hips and wears KNIX S

Absorbency: Heavy

Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons
Essential
Drop
Drop
Drop
Drop
Drop
No Absorbency
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons
Moderate
Drop
Drop
Drop
Drop
Drop
about 2-4 super tampons
Ultra
Drop
Drop
Drop
Drop
Drop
about 7-11 super tampons

Color: Warm Sand

Size:

True to Size

•

Size:

Size and Fit Guide

Free Shipping on orders $100+

Shipping

Shipping
Processing Time

Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.

Delivery Time

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

Shipping Charges

Orders over $100* USD = Free standard Shipping (4-8 business days)**
Expedited = $4.99 USD (3-6 business days)**

Orders under $100* USD = $7.99 USD Standard Shipping (4-8 days)**
Expedited = $9.99 USD (3-6 business days)**

*After discounts, before shipping and taxes. Processing times not included in estimates.
**Military Addresses Excluded. Standard Military Address Shipping = $10.00 USD (est. varies per location)
Easy Exchanges within 30 Days

Returns

Returns

Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.

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Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.
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"These stylish panties fit comfortably and weren't noticeable under tight clothes."

- Reviewed

Comfort-First Fit

Classic mid-rise silhouette with provides medium hip and bum coverage.

Worry-Free Protection

Patented bonded edges help prevent side leaks.

Heavy Absorbency

Absorbs 6 Super tampons worth of liquid—perfect for heavy flow days, overnight protection, and light bladder leaks.

No More Panty Lines

Made from our signature buttery-soft fabric and designed to be invisible under clothes, including leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

Ashley has 39” hips and wears KNIX S | Warm Sand
| Warm Sand
Ashley has 39” hips and wears KNIX S | Warm Sand
Ashley has 39” hips and wears KNIX S | Warm Sand
| General
Super Leakproof® No-Show Bikini | General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Everyday Wear
  • • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • light period days
  • • sweat
  • • discharge
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • • moderate period days
  • • light bladder leaks
  • • sweat
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups
PATENTED LEAKPROOF TECHNOLOGY

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 3-6 super tampons worth of liquid so you feel fresh and in-control.

Soft Top Layer

Soft Top Layer

Gently wicks away moisture while keeping you feeling fresh and odor-free.

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4.6
Rated 4.6 out of 5 stars
Based on 2,906 reviews
Total 5 star reviews: 2.3k Total 4 star reviews: 359 Total 3 star reviews: 129 Total 2 star reviews: 83 Total 1 star reviews: 85
93%would recommend these products
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
Ease of UseRated 4.8 on a scale of 1 to 5
Write a Review (Opens in a new window)
2,906 reviews
  • Rated 5 out of 5 stars
    5 days ago
    5 Stars

    Great underware. Very comfortable

    Aimee
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    5 Stars

    Great underware. Very comfortable

    Aimee
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Super Leakproof No Show Bikini

    Arrived as expected and on time. I am using these as backups for heavy nights and unexpected travel days.

    Stephanie L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Super comfortable!

    This was my first time trying period underwear and did not disappoint! The design is incredibly comfortable, fabric is stretchy and fits like a glove. I wear this on the days that I’m using a tampon and want extra protection (medium to heavy flow girly). true to size, bought L 79kg 5’4 for reference.

    Brenda P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Love super absorbing

    Love these super Absorbent comfy undies

    Leah S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Good fit

    I like the way they fit. I like the way they feel. They do a good job at containing the urine.

    Susan W.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 weeks ago
    My favorite fit

    These underwear run small so I have to order a size up but the bikini cut works the best for my large hips. Very comfortable and full leak protection.

    Darlina B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Very comfortable and they work great!

    Patricia
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Very Comfortable

    I forgot that I had my period, as if I am wearing a normal panties

    Joelle D.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Tried and True

    I love using these as backup during my period and even towards the end when my flow is lighter. They’re very comfortable, not too bulky where I feel like I’m wearing a pad, and sit well under my clothes.

    Cara H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Zero leaks

    My wife loves the panties so I bought more

    Ale S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Long Lasting

    I just bought more of these because the ones I bought 6 years ago finally fell apart. I love these! Also great for sweaty workouts.

    Kristen P.
    Verified Buyer
    Was this helpful?