No entry in our compiled ruleset — verify with Costco wholesale vendor requirements.
Douglas clean criteria
Banned
Douglas Clean Beauty label: products carrying the seal must be free of Silikone (silicones); matched on the -methicone INCI stem (dimethicone, amodimethicone, phenyl trimethicone) because no common silicone INCI contains the literal string "silicone". Corroborated by Douglas's own program description and independent secondary coverage of the Clean Beauty Q&A.