Period Underwear Brands Compared
Brand guide
Quick answer
Popular period underwear brands include Thinx, Knix, Saalt, Modibodi, Aisle, The Period Company, Ruby Love, Bambody and Dear Kate. They differ in price, sizes, fabric and coverage. Kischt makes one style for heavy flow: a high-waisted, full-coverage brief in sizes XS to 4XL, for $24.95 a pair.
Kischt Period Underwear 3-Pack, The Everyday Trio, $59.95 ($19.98 a pair). 30-day returns. Free shipping over $50.
- Prices, sizes and fabrics vary a lot between brands.
- Many brands offer sizes up to 4X or larger.
- Return rules differ, so read them before you buy.
- Kischt is a high-waisted brief for heavy flow, XS to 4XL.
What Sets Period Underwear Brands Apart
Brands differ in four main ways: price, sizes, fabric and coverage. Some sort their styles by absorbency level. Others sort them by fabric or cut. Return rules differ too.
Period Underwear Brands to Know
- Thinx: many cuts in sizes XS to 4X. Its bladder leak line was once called Speax.
- Knix: Leakproof styles in four levels, Light to Ultra. Sizes run XS to 4XL.
- Saalt: Light, Regular, Heavy and Super levels in sizes XXS to 4XL. It gives you 90 days to return or exchange.
- Modibodi: Light, Moderate, Super and Maxi levels. Its Classic styles use bamboo viscose with a merino wool gusset.
- Bambody: styles made with bamboo rayon, in sizes XS to 6XL.
- The Period Company: styles for medium and heavy flow, many in cotton. Sizes run XS to 6X.
- Aisle: Lunapads changed its name to Aisle in 2020. It sells period underwear and reusable pads.
- Ruby Love: period underwear and swimwear in sizes up to 8XL. It offers 30-day exchanges on unused pairs.
- Dear Kate: sizes XS to 3X, with a mini or full lining.
- Cora: sells tampons, pads, cups and discs. Its Free-to-Flow period underwear has a cotton body.
- Flux Undies: the brand is now called Fluxies. Its site lists levels from Lightest to Super Heavy.
Price and Sizes at a Glance
| Price per pair | Sizes | |
|---|---|---|
| Thinx | About $20 to $45 | XS to 4X |
| Knix | About $25 to $39 | XS to 4XL |
| Saalt | About $28 to $45 | XXS to 4XL |
| Bambody | About $10 to $15 | XS to 6XL |
| The Period Company | About $11 to $26 | XS to 6X |
| Kischt | $24.95, or $17.99 in a 5-pack | XS to 4XL |
Facts come from each brand's site in October 2026. Prices are list prices for one pair at that time. Some sleep shorts cost more.
How Kischt Compares
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Made for heavy flow
Kischt has three absorbent layers, made for heavier flow days. A moisture barrier helps stop leaks reaching your clothes.
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More cover at the back
The gusset runs up toward the back. With the high waist and full back, you get more cover when you sit or lie down.
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A clear price
One pair is $24.95, or $17.99 a pair in the 5-pack. Sizes run XS to 4XL in six colors.
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30-day returns
You have 30 days after you get your order to request a refund. Email hello@kischt.com with your receipt or proof of purchase. You pay return shipping.
Start With the Everyday Trio
Kischt Period Underwear 3-Pack, The Everyday Trio · $59.95 ($19.98 a pair)
Three pairs for $59.95, or $19.98 a pair. 30-day returns. Free shipping over $50.
Shop the 3-packOr save more with the 5-pack: $17.99 a pair
Questions? Email hello@kischt.com.
Common questions
What is the best brand of period underwear?
The best brand is the one that fits your flow, body and budget. For heavy flow, look for full coverage and a gusset that runs up the back. Kischt is made for that.
What is Cora period underwear made of?
Cora's help page says the body is 95% cotton and 5% elastane. Cora also sells tampons, pads, cups and discs.
What happened to Lunapads?
Lunapads changed its name to Aisle in 2020. Aisle still sells period underwear and reusable pads.
How does Dear Kate compare to Thinx?
Dear Kate runs XS to 3X, with a mini or full lining. Thinx runs XS to 4X. Both sell several cuts, so compare fit and price.
What happened to Flux Undies?
Flux Undies is now called Fluxies. Its site lists levels from Lightest to Super Heavy.
Which period underwear brands come in plus sizes?
Many do. Ruby Love goes up to 8XL, Bambody to 6XL and The Period Company to 6X. Kischt runs XS to 4XL.
More guides
- Buyer's guideBest Period Underwear: How to Pick the Right Pair
- Brand guideThinx Alternatives: How to Choose the Right Pair
- Brand comparisonKischt vs Thinx Period Underwear
- Brand comparisonKischt vs Knix Period Underwear
See all guides: Period Underwear Guide: Every Question Answered
Sources
- Thinx: Shop All Period Underwear
- Thinx: We Don't Just Make Period Underwear (2023)
- Knix: Period Underwear
- Knix: Period Underwear Collection
- Saalt: Period Underwear
- Saalt: Leakproof Comfort Brief
- Saalt: Bliss Guarantee
- Modibodi US: Classic Period Underwear
- Modibodi US: Classic Bikini Maxi
- Bambody: Period Underwear
- The Period Company: Underwear
- Aisle: The Big Reveal (Lunapads is now Aisle, 2020)
- Aisle: Leakproof Underwear and Reusable Pads
- Ruby Love: Period Underwear and Swimwear
- Ruby Love: Women's Period Underwear Brief
- Ruby Love: Exchange Policy
- Dear Kate: FAQs
- Cora: What fabric is your Period Underwear made of?
- Cora: Period Care
- Fluxies: FAQs (founded as FLUX Undies)
- Kischt: Return Policy
Updated by the Kischt team.
Brand details were checked on each brand's own site in October 2026. They can change, so check before you buy.
Returns: you have 30 days after you get your order to request a refund. Details are in the return policy.