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Home / Bikini Underwear / Leakproof UltraThin No-Show Bikini - Starter Kit
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Leakproof UltraThin No-Show Bikini - Starter Kit

$28.00 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

| Sola
Isabelle has 40” hips and wears a Knix size M | Sola

Isabelle has 40” hips and wears a Knix size M

Isabelle has 40” hips and wears a Knix size M | Sola

Isabelle has 40” hips and wears a Knix size M

Isabelle has 40” hips and wears a Knix size M | Sola

Isabelle has 40” hips and wears a Knix size M

Leakproof UltraThin No-Show Bikini - Starter Kit | Sola

Leakproof UltraThin No-Show Bikini - Starter Kit

Leakproof UltraThin No-Show Bikini - Starter Kit | Sola

Leakproof UltraThin No-Show Bikini - Starter Kit

Leakproof UltraThin No-Show Bikini - Starter Kit | Sola

Leakproof UltraThin No-Show Bikini - Starter Kit

Absorbency: Moderate

Color: Sola

Size:

True to Size

•

Size:

Size and Fit Guide

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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.
Easy Exchanges within 30 Days

Returns

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Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

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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| Sola
Isabelle has 40” hips and wears a Knix size M | Sola
Isabelle has 40” hips and wears a Knix size M | Sola
Isabelle has 40” hips and wears a Knix size M | Sola
Leakproof UltraThin No-Show Bikini - Starter Kit | Sola
Leakproof UltraThin No-Show Bikini - Starter Kit | Sola
Leakproof UltraThin No-Show Bikini - Starter Kit | Sola

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

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4.4
Rated 4.4 out of 5 stars
Based on 686 reviews
Total 5 star reviews: 503 Total 4 star reviews: 74 Total 3 star reviews: 43 Total 2 star reviews: 28 Total 1 star reviews: 38
86%would recommend these products
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686 reviews
  • Rated 5 out of 5 stars
    3 minutes ago
    Love the fit

    The fit is perfect, true to size. they are very comfortable and not bulky.

    Carol I.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    Love

    Got these for my daughter who is 11 and started her period she loves them . Wish they had these when I was kid

    Coral E.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    Amazing

    The new pair I got recently, the way the pads are sewn in are SO comfortable! These undies make me feel so much more secure with not only my period, but every day comfort! LOVE THESE!

    Megan H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Work great

    I bought these for my 12 year old daughter and she loves them. They fit great and have great absorbency.

    Michelle Y.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Lifesaver

    Thin but well built. Gusset had adequate coverage for night and great for most period days.

    Hilary H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    JB

    These are super comfy and look great under clothes. No panty lines like other products I’ve tried. Really happy with them.

    Julie B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Great Item

    Comfortable. Beautiful. Knix items are top of the line Thank You

    Mary B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Leakproof underwear

    Great protection and they feel light and airy. Very comfortable.

    Tracey H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Comfy, Cute, and absorbent

    Love these! They feel comfy, fit me well and are great for my lighter days on my period.

    I will definitely be buying a few more soon.

    Thanks!

    Leah H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    SOOOO WORTH IT

    The best period underwear I’ll be buying more. I’m normally a size small and ordered a size small and it fit perfectly. I normally buy this as back-up for wearing a tampon but I wore this without a tampon or pad for a few hours and it did not leak at all.

    Katherine S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    So good

    Wasn’t sure about these but so happy I have them a try !

    Marieve L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Quite Impressed

    My first time trying period underwear, and I thought these were great. No leaks and fairly comfortable. I’ve been thinking about buying them for a while and I’m glad I finally did.

    Nora H.
    Verified Buyer
    Was this helpful?