A Dutch intimate apparel buyer messaged our QC team last quarter with a pointed question: how do we know a pair of period panties will still perform at wash sixty, and not just on the first three cycles she pulls out of the carton? Her concern was grounded. Some 2023 shipments we sent her are still earning four-star reviews two years later. Other factories' product, identical on the tech sheet, starts leaking by month three.

This article walks through the protocol our Shantou floor runs before any period underwear order ships. The data, the test thresholds, and what to look for when reviewing a private label run.