Cora
Specs partially disclosed cora.life ↗
Like all period underwear, Cora's can't be plastic-free - the absorbent and leakproof layers are synthetic by necessity (an organic cotton outer over a polyester/elastane/TPE core). What Cora offers is chemistry transparency: its fabrics are OEKO-TEX certified and additionally third-party lab tested to show no detectable PFAS/PFOA or azo dyes. It belongs in the conversation on the PFAS standard, not as a natural-fiber product.
How clear are their specs?
Publishes the organic cotton outer and the gusset composition (about 91% polyester / 9% elastane core) and cites third-party PFAS "not detected" testing.