Cosmetic formulation containing an aqueous phase and a non-aqueous phase and characterized in that it contains at least one amphiphilic non-water-soluble comb copolymer consisting of, expressed in % by weight of each of the comonomers: a) from 30% to 60% of at least one hydroxy and/or methoxy polyalkylene glycol monomer of formula R - m - n - R', with: - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating the methacrylate or methacrylurethane function, - R' designating a hydroxy or methoxy group, b) from 20% to 60% of at least one hydrophobic monomer chosen from styrene and paratertiobutylstyrene, and (meth)acrylic esters with 1 to 4 carbon atoms on the ester group, c) from 0.1% to 10% of at least one monomer which is acrylic and/or methacrylic acid, d) from 0 to 15% of an associative monomer of formula R - m - n - R', with: - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating a polymerizable function, preferentially the methacrylate or methacrylurethane function, - R' designating a linear or branched alkyl or aryl or alkylaryl group with 8 to 36 carbon atoms, e) from 0 to 5% of a monomer comprising at least two ethylenic unsaturations, the sum of the percentages a), b), c), d) and e) being equal to 100%, and in that said cosmetic formulation has a pH between 5 and 6. a) from 30% to 60% of at least one hydroxy and/or methoxy polyalkylene glycol monomer of formula R - m - n - R', with: - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating the methacrylate or methacrylurethane function, - R' designating a hydroxy or methoxy group, - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating the methacrylate or methacrylurethane function, - R' designating a hydroxy or methoxy group, b) from 20% to 60% of at least one hydrophobic monomer chosen from styrene and paratertiobutylstyrene, and (meth)acrylic esters with 1 to 4 carbon atoms on the ester group, c) from 0.1% to 10% of at least one monomer which is acrylic and/or methacrylic acid, d) from 0 to 15% of an associative monomer of formula R - m - n - R', with: - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating a polymerizable function, preferentially the methacrylate or methacrylurethane function, - R' designating a linear or branched alkyl or aryl or alkylaryl group with 8 to 36 carbon atoms, - m and n designating integers that are less than or equal to 150, with at least one of them being a non-zero, - EO and PO respectively designating ethylene oxide and propylene oxide, - R designating a polymerizable function, preferentially the methacrylate or methacrylurethane function, - R' designating a linear or branched alkyl or aryl or alkylaryl group with 8 to 36 carbon atoms, e) from 0 to 5% of a monomer comprising at least two ethylenic unsaturations,