Certification & transparency
Louloucup underwear has been certified by one independent body and analysed by another. Both documents are on this page, in full — not summarised, not behind a form.
We sent our fabric to SMT Lab, an independent French testing laboratory, and asked them to look for the substances people worry about most in period underwear. Here is the full list, with the method used and the threshold each test can detect down to.
Certified under OEKO-TEX® STANDARD 100, and separately lab-tested for PFAS — because a certification and a lab report aren't the same thing.
| Tested for | Method | Detection limit | Result |
|---|---|---|---|
| PFASPerfluorinated and polyfluorinated compounds | CEN/TS 15968 · LC-MS/MS | 25 ppb | Not detected |
| Formaldehyde | NF EN ISO 14184-1 | 0.5 ppm | Not detected |
| Aromatic amines24 substances | Liquid–liquid extraction | 0.5 mg/kg | Not detected |
| Carcinogenic and allergenic dyes | DIN 54231 · LC/MS | 0.01 mg/l | Not detected |
| Nonylphenol and octylphenol | HPLC/DAD | 50 mg/kg | Not detected |
| Their ethoxylatesNPEO, OPEO | CEN/TC 248 · HPLC/DAD | 50 mg/kg | Not detected |
| Organotin compounds12 substances, incl. TBT and DBT | EN ISO 17353 · GC/MS | 0.5 mg/kg | Not detected |
| Pesticides | GC/MS | 1 mg/kg | Not detected |
| Solvents and triclosanDMF, benzene, formamide, NMP, quinoline and others | GC/MS | Per substance | Not detected |
| Heavy metalsArsenic, cadmium, mercury, lead, chromium, nickel and others | NF EN 16711-2 · ICP-OES | Per metal | Below all limits |
| pH of the fabric | EN ISO 3071 | Range 4.0–7.5 | 6.7 — skin-neutral |
Sample: 90% organic cotton, 10% elastane — the layer against your skin.
Analysis: SMT Lab, France · Report issued 1 June 2022
The documents
Certificate 2026OK1834
KLEA SAS is the company behind Louloucup.
Report 122-0649/1
The report is issued in French. The table above is a translation of its results.
Materials and making
The lining that sits against your skin is GOTS-certified organic cotton — the same fabric that went to the laboratory.
We were one of the first period underwear brands in France, and every style is still developed here. Nine years of refining the same thing.
