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New

Leakproof UltraThin No-Show Bikini Shimmer 3-Pack

$75.00 USD

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Absorbs about 2.5 super tampons

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Invisible under clothes

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Moderate protection without the bulk

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Machine washable

| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry

Color: Tapestry/Burnished Gold/Dark Cherry Limited Edition

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.

Sale & Last Call

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.

Rewards Members Earn 75 Points

"These are my favorite of all the period underwear styles I have tried, and I now own enough for a full cycle of wear."

- InStyle

Comfort-First Fit

Bikini silhouette with a classic mid-rise fit, medium hip and bum coverage.

Worry-Free Protection

Our newest leakproof innovation provides more absorbency without the bulk. Patented 360 LeakSeal™ technology locks in leaks at every edge.

Moderate Absorbency

Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.

No-Show Style

Made from our signature buttery soft fabric with a wide, comfortable waistband. Wear it on its own or under your favorite pajamas.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry
| Tapestry/Burnished Gold/Dark Cherry

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
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Our patented 360 LeakSeal™ technology locks in leaks at every edge. The ultra-thin liner absorbs about 2.5 super tampons worth of liquid.

Soft Top Layer

Soft Top Layer

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

4.5
Rated 4.5 out of 5 stars
Based on 568 reviews
Total 5 star reviews: 430 Total 4 star reviews: 60 Total 3 star reviews: 32 Total 2 star reviews: 22 Total 1 star reviews: 24
89%would recommend these products
568 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    Must try!

    So effective and comfortable!

    Reshma S.
    Verified Buyer
  • Rated 5 out of 5 stars
    14 minutes ago
    Fabulous undies!

    Exactly what I needed. These are very comfy, well made, and do what they say they will. I just bought a bunch more. Very happy with these undies.

    Heather D.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 days ago
    5 Stars

    So cute, true to size and totally feel safe with no worries about leaks

    Spc
  • Rated 5 out of 5 stars
    3 days ago
    5 Stars

    Comfortable and truly outfit saving. Even wore under leggings and it wasn’t apparent they were any different than a normal pair.

    Elisa
  • Rated 5 out of 5 stars
    3 days ago
    5 Stars

    Comfortable and truly outfit saving. Even wore under leggings and it wasn’t apparent they were any different than a normal pair.

    Elisa
  • Rated 5 out of 5 stars
    4 days ago
    5 Stars

    Love them.

    Eleni
  • Rated 5 out of 5 stars
    4 days ago
    5 Stars

    Love them.

    Eleni
  • Rated 5 out of 5 stars
    1 week ago
    Daughter loves them!

    My daughter is 16 and loves these undies. They are super comfortable and provide added confidence throughout the day. She wears them daily and doesn’t wait for her menstrual cycle.

    Sandra S. I.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Pretty decent

    Works well for me! At night I sleep on my back so I use a knix period pad.

    Tristan S.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Great product

    Perfect for my tween!

    Emily R.
    Verified Buyer
  • Rated 2 out of 5 stars
    2 weeks ago
    Only ok

    they do what they say. Seem to have an odor though. Probably should have returned.

    laura m.
    Verified Buyer
  • Rated 4 out of 5 stars
    3 weeks ago
    Great product

    I love these and feel confident again without having to wear a pad or panty liner the only problem I’ve had is they slide down. If I have to do any walking around they’re gonna end up under my butt!

    Traci
    Verified Reviewer