Here's a thing the category would rather you didn't clock: most of the big period underwear names aren't independent anymore. They have parent companies. Boards in other hemispheres. Targets set a long way from your laundry basket. None of it shows up on the label.
So before we get into absorbency, PFAS and what a pair actually costs over its life, it's worth knowing who you're really buying from. This isn't a takedown. Everyone's underwear is fine. It's just the one fact nobody in the aisle volunteers, and once you've seen it, the rest of the comparison reads a little differently.
Who actually owns your period underwear brand?
Most of the big names are not independent anymore. Modibodi and Knix are owned by Essity, a Swedish hygiene multinational. Thinx is majority-owned by Kimberly-Clark, the company behind Kotex. Scarlet is independently owned and run from Melbourne. No board in another hemisphere, no parent company playbook. When you buy from Scarlet, you are dealing with the person who answers for the product. That is not a knock on anyone's underwear. It is just information the category does not volunteer.
The rest of the comparison, minus the marketing
Ownership is the part nobody says out loud. Here's the part everyone dresses up, stated plainly instead. Five things worth checking, no strawmen, no invented specs.
| What matters | Scarlet | Typical period underwear |
|---|---|---|
| Absorbency, stated plainly | Every pair rated in tampon equivalents: Super Light under 1, Light around 2, Moderate around 3, Heavy around 4 | Vague labels like light or super, often without a stated volume |
| Materials | Core range 95% organic cotton; every style multi-layered | Mostly synthetics; composition varies by style |
| PFAS | PFAS-free and independently lab tested, every style | Not always disclosed; the category has faced PFAS questions in recent years |
| Trying it | 30-day risk-free trial on your first pair, even worn | Typically unworn returns only |
| Lifespan | Around 2 years with normal machine washing | Similar when cared for; check each brand's care rules |
| Price | $22 to $30 a pair | Roughly $25 to $40 a pair |
Quick answers
How do I pick an absorbency?
Match it to your heaviest hour, not your average day. Super Light holds under one tampon's worth (spotting, backup), Light around two, Moderate around three, Heavy around four (full days and overnight). If you are between two, size the absorbency up.
Does period underwear actually replace tampons and pads?
For most people, on most days, yes. Each pair is multi-layered: a wicking layer keeps you dry, an absorbent core holds the fluid, a leakproof layer keeps it off your clothes. On very heavy days many people pair underwear with the Period Cup for up to 8 hours of backup. See how period underwear works.
What is the PFAS situation?
PFAS are so-called forever chemicals that have turned up in some period products overseas. Every Scarlet style is PFAS-free and independently lab tested. We publish that because you should not have to email a brand to ask. Shop the tested range.
Can I try it without wasting money?
Yes. Your first pair comes with a 30-day risk-free trial: wear it, wash it, and if it is not right, email support@scarletperiod.com. First order, first-timers, underwear only. Read the trial terms.
What does switching save?
The average period haver spends around $240 a year on tampons and pads. A drawer of Scarlet pairs lasts around two years and washes like normal underwear, so the maths swings hard after the first few months. Exact savings show on every set in percentages. See the sets.
Start with one pair.
Pick your absorbency, wear it on a real cycle day, and let the trial carry the risk. That is the whole pitch. Shop period underwear