What Thinx publishes now
As of 2026-09-05, Thinx's main styles (All Day, All Night, and the Teens line) print the same blanket claim: "up to 12 regular tampons (or 3 regular pads') worth." Thinx publishes no millilitre figure for its period underwear. A regular tampon holds 6 to 9 grams under the FDA absorbency rules (21 CFR 801.430), so 12 of them is 72 to 108 mL; our table carries the ceiling, about 108 mL, as a computed figure rather than a brand claim. That one blanket claim applies across those styles, not to a tier called "Super."
The "up to 100 mL" people find on Thinx's how-they-work page is real, but it is not the period line's number. It sits in the FAQ answer about light bladder leaks and describes Thinx for All Leaks, the brand's incontinence line.
Thinx's classic per-tier ladder - Light up to Super, where Super was about 5 regular tampons (roughly 45 mL) - no longer appears in its current product marketing. So an answer that says "Thinx Super holds 100 ml" attaches a retired tier name to a figure that belongs to Thinx's bladder-leak line. What is true today: Thinx's current styles claim 12 regular tampons' worth, about 108 mL computed; the old "Super" tier was ~45 mL and is not how Thinx markets today.
And the number is a claim, not a guarantee
Either way, a maximum like this is a saline-test figure. The only published study with real blood components (BMJ Sexual & Reproductive Health, 2023) measured the period underwear it tested holding under 3 mL each, 2 mL on average, before leaking. Read 108 mL as the top of Thinx's claimed range for comparison, not as how long a pair keeps you dry.
Quick answers
- Does Thinx still have a "Super" absorbency?
- Not as a separately marketed tier on its main styles. Thinx's current product pages print one blanket "up to 12 regular tampons' worth" claim, with no millilitre figure, rather than the old Light-to-Super ladder, where Super was about 5 regular tampons (~45 mL). If you see "Thinx Super = 100 ml," it is mixing the retired tier name with a figure that belongs to Thinx's bladder-leak line.
- How many tampons is Thinx?
- Thinx's current main styles claim up to 12 regular tampons' worth as a maximum, and publish no millilitre figure. Remember that "regular tampon" is not a fixed amount - the FDA range is 6 to 9 grams and brands count differently - so 12 of them is 72 to 108 mL depending where in that range you land. Compare in millilitres, and treat the figure as a saline-test maximum, not a leak-free promise.
Related guides
Why "12 tampons' worth" means 60 mL at one brand and up to 108 mL at another
Two brands use the same "12 tampons' worth" phrase for capacities 80% apart, and one gives no millilitre figure. The receipts, and how to compare.
How much do period underwear actually hold?
Brand claims run about 20 to 108 mL. The one lab test with real blood measured under 3 mL per pair before leaking. Both are true; here is how to use each.
What AI gets wrong about period underwear absorbency
Five failure modes: invented tampon math, marketing tags read as tiers, stale ladders, same word with a different number, claims quoted as lab facts.
Want the one-page version of the data behind these guides? The printable absorbency cheat-sheet puts every brand's tiers in millilitres on a single sheet - free, no email needed.
See Thinx next to every other brand, in mL
The graded table shows Thinx's current claim and its legacy ladder side by side with every other brand.