Dimethicone/Divinyldimethicone/Silsesquioxane Crosspolymer is a crosslinked copolymer of Dimethicone (q.v.), Divinyldimethicone (q.v.) and silsesquioxane monomers. See Reported Ingredient Functions-The Cosmetic Drug Distinction, in Regulatory and Ingredient Use Information, Volume I, Part A.