Skip to content

Your Bag

Your cart is empty

But you're full of potential..

Rewards Members Earn 0 Points

Light Leakproof No-Show Bikini

$25.00 USD

Mix, Match & Save: 3+ for $20 each
Checkmark

Absorbs about 1 regular tampon

Checkmark

Invisible under clothes

Checkmark

Perfect for daily wear

Checkmark

Machine washable

| Warm Sand
| Warm Sand
| Warm Sand
| Warm Sand
| General
| General
| General

Color: Warm Sand

Size:

True to Size

Size:

Size and Fit Guide

Build Your 3-Pack

| Warm Sand

Light Leakproof No-Show Bikini

Color: Warm Sand

Size:

Size:

| Warm Sand

Light Leakproof No-Show Bikini

Color: Warm Sand

Size:

Size:

| Warm Sand

Light Leakproof No-Show Bikini

Color: Warm Sand

Size:

Size:

Free Shipping on orders $100+

Shipping

Shipping

Processing Timelines

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

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.

First Pair Risk Free for 30 Days

Leakproof Underwear, Risk Free

Returns & Exchanges

Leakproof Underwear, Risk Free
Trying leakproof underwear for the first time? Your first pair is completely risk free for 30 days. Wear them, wash them, and see how they work for your body. If they’re not right for you, we’ll refund your first pair. Prefer a different size or style? We also offer free exchanges.

How it works:

  • Risk free applies to leakproof underwear on your first order
  • Refund covers the item price (original shipping excluded)
  • Just email info@knix.com and we’ll take care of you

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

Rewards Members Earn 25 Points

"...the most comfortable period underwear I've ever tried."

- Good Housekeeping

Product Description

So thin, you’ll forget you’re wearing anything. This style has medium bum and hip coverage. Our original leakproof technology offers a barely-there feel while absorbing about 1 regular tampon or pantyliner worth of liquid. Patented bonded edges help prevent against side leaks. These underwear feature our signature buttery soft fabric. No show construction is designed to be invisible under clothes, including workout leggings

Comfort-First Fit

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

Worry-Free Protection

Our original leakproof technology provides a barely noticeable feel. Patented bonded edges help prevent side leaks.

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.

No-Show Style

Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Warm Sand
| Warm Sand
| Warm Sand
| Warm Sand
| General
| General
| General

How to Choose?

Essential

  • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

  • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • 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

  • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

  • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • 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

  • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • 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 1 regular tampon 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.

4.5
Rated 4.5 out of 5 stars
Based on 6,217 reviews
Total 5 star reviews: 4.6k Total 4 star reviews: 864 Total 3 star reviews: 350 Total 2 star reviews: 184 Total 1 star reviews: 189
91%would recommend this product
FitRated -0.1 on a scale of minus 2 to 2
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
Ease of UseRated 4.6 on a scale of 1 to 5
6,217 reviews
  • Rated 5 out of 5 stars
    Yesterday
    Très confortable!

    Super confort

    Erika G.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 days ago
    Perfect fit

    This is a true bikini style, fits very comfortably.

    Teresa F.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 days ago
    Small fit but effective

    These fit small but do the job

    Marnie G.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 days ago
    Light leakproof no-show bikini

    Sized perfectly! So comfortable! Feels like you’re not wearing anything! 😍❤️

    Angelika K.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Love !

    I can't believe I didn't buy sooner . Love the comfort and convenience of not needing panty liners. I feel so confident with these panties .

    Sharon R.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    AWESOME!

    Love, Love, Love these underwear! Thank you, to the designer of these underwear.

    Patricia S.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    évaluation sous vêtement

    Entièrement satisfaite

    Marie S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    So far so good

    So far my little leaks have been contained !

    Barb D. N.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfortable

    Super comfy and cute, will absolutely buy again!

    Elissia D.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfortable

    Love these underwear for daily use. I have an IUD so never know when I’ll spot so these make me confident all day.

    Kristin I.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Magic!

    I don't know how they work, but love these undies! They are 100% leak proof!! I bought the medium and may size up next time as I feel they're a bit tight around the tops of my thighs - but not uncomfortable! I will definitely purchase more pairs!

    Danielle G.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 months ago
    Love them!

    I absolutely love everything about them ! They feel like your wearing nothing, so comfortable yet effective

    Cora Y.
    Verified Buyer