Class II: a) comprising about 0.15% to about 12.0% moisture regulating substance or mixture of moisture regulating substances, wherein the moisture regulating substance has a structure selected from the following classes: 1) Wherein R is hydrogen or a metal ion, R6 is methyl, ethyl, propyl, alkenyl or phenyl having less than 12 carbon atoms, R7, R8, R9, R10, R11 and R12 are a hydrogen group, a methyl group, an ethyl group, a propyl group, a phenyl group, a hydroxyl group, a methoxy group or an ethoxy group)； b) an alcohol (wherein R13 is an alkyl, alkenyl, straight A chain or a branched carbon chain； R14 is hydrogen, hydroxyl, alkyl, methyl, ethyl and propyl, the alcohol structure comprising a total of less than 20 carbon atoms)； c) the position of C2 Not good Alcohol containing saturated double bonds. d) an alkyl-substituted glycol in which the structure of the alkyl-substituted glycol contains less than 20 carbon atoms； e) a mono- or dialkyl-substituted glycerin or glycerin ester structure that contains a total of less than 20 carbon atoms. Alkyl or dialkyl-substituted glycerin or monoester or diester of glycerin with fatty acid； Is selected from one or more of fatty acid esters containing a total of 15 to 40 carbon atoms, wherein the class II moisture regulator is weakly acidic Non-acidic, and further Class II moisture regulators have a protein binding higher than 10, a molecular volume lower than 1500, An aqueous hair leave-on composition for aqueous hair leave-on compositions for reducing hair frizz, having a log P higher than 0.5, a pKa of 5 or more, and a hydrogen bond higher than 4.約０．１５％～約１２．０％の水分調整物質又は複数の水分調整物質の混合物を含み、水分調整物質は、次のクラス： １）以下から選択される構造を有するクラスＩＩ： ａ） 【化１】 （式中、Ｒは、水素又は金属イオンであり、Ｒ6は、１２個未満の炭素原子を有する、メチル、エチル、プロピル、アルケニル又はフェニルであり、Ｒ7、Ｒ8、Ｒ9、Ｒ10、Ｒ11、Ｒ12は、水素基、メチル基、エチル基、プロピル基、フェニル基、ヒドロキシル基、メトキシ基又はエトキシ基である）； ｂ） 【化２】 アルコール（式中、Ｒ１３はアルキル、アルケニル、直鎖又は分枝鎖の炭素鎖であり；Ｒ１４は、水素、ヒドロキシル、アルキル、メチル、エチル及びプロピルであり、アルコールの構造が全計で２０個未満の炭素原子を含む）； ｃ）Ｃ２の位置に不飽和二重結合を含む、アルコール。
