Disclosed are cosmetic compositions and methods of making up keratinous tissue in a way that preserves long-wear but also greater comfort, reduced tackiness and enriched color, and which entail use of polyhedral oligomeric silsequioxanes (POSS ) -grafted polyolefins.Cette invention concerne des compositions cosmétiques et des procédés de maquillage des ongles longue tenue, savérant plus confortables, moins collantes et aux couleurs plus riches. Linvention implique lutilisation de polyoléfines greffées avec des silsesquioxanes oligomères polyédriques (POSS).