A composition directed to an aqueous hair leave-on composition for hair frizz reduction comprising from about 0.15% to about 12.0% of a moisture control material or mixture of moisture control materials wherein the moisture control material is selected from one or more of the following class:Class I having the structure selected from: wherein R′ is —COOY, sulfonic acid, or C═CH—COOY, Y is hydrogen or a metal ion, R1, R2, R3, R4, R5 is hydrogen, methyl, ethyl, propyl, vinyl, allyl, methoxy, ethoxy, hydroxyl, halogen, sulfate, sulfonate, nitro, or —CH═CH—COOR, and wherein the moisture control material is an acidic material and further wherein the moisture control material has a % Protein binding higher than 20 and Molecular Volume lower than 500 and Partition coefficient octanol to water (log P) lower than 3 and hydrogen binding higher than 10 and pKa lower than 5.0.