Cosmetic agents and methods for the temporary deformation of keratinous fibers using the cosmetic agents are provided herein. In one embodiment, the cosmetic agent for the temporary deformation of keratinous fibe includes a cosmetic preparation. The cosmetic preparation contains at least one copolymer a1) composed at least of the following monomer units: styrene, and at least one of acrylic acid or methacrylic acid. The cosmetic preparation further contains at least one copolymer a2) composed at least of the following monomer units: N-tert-butylacrylamide, acrylic acid, and ethyl acrylate. The weight fraction of copolymers a1) and a2) in the total weight of the cosmetic preparation is about 10 to about 30% by weight.
