EVA vs PEVA

PEVA is sometimes marketed as "EVA-equivalent" — particularly in lower-priced shower curtains and yoga mats. The chemistry is close but not identical: PEVA blends polyethylene into the EVA matrix to lower cost, which makes the chemical profile harder to verify and certify.

Medical-grade EVA, like the kind PopsyKosy uses, is pure ethylene-vinyl acetate — single-source resin with traceable supply chain. We don't substitute PEVA, even though it would cut material cost meaningfully.