A cosmetic agent for temporarily deforming keratinic fibers, comprising a) a cosmetic preparation, containing, a1) at least one copolymer constructed at least from the following monomer units: - N-tert-octylacrylamide, - acrylic acid, - tert-butylaminoethyl methacrylate and a2) at least one copolymer constructed at least from the following monomer units: - N-tert-butylacrylamide - acrylic acid - ethyl acrylate, wherein the proportion by weight of copolymers a1) and a2) in the total weight of the cosmetic preparation is 1.0 to 10.0 % by weight. Also disclosed is a cosmetic product comprising the aforementioned agent as well as a method and use of the said agent in the temporary deformation of keratin-containing fibers i.e., human hair.
