On one hand, the present invention relates to cosmetic compositions comprising poly(lactic glycolic)acid (PLGA) nanoparticles for applications to the skin. On the other hand, it also concerns polymeric nanoparticles having on its surface a plurality of cosmetically active agents, each of said agents being associated to said nanoparticle via oleylcysteineamide, delivery systems for topical application based on said particles and cosmetic formulations comprising said particles.