To improve the ease of handling of keratin fibers such as hair, this ease of handling can be maintained for a long period of time, for example up to one month after treatment, and can be sustained even at daily activities at home, for example even after shampooing Provide a means.A composition comprising (1) at least one aminosilicone compound and (2) at least one poly (carbodiimide) compound, wherein the amount of the aminosilicone compound is in the range of To 3% by mass or more.Selection drawing None【課題】ケラチン繊維、例えば毛髪を扱い易さについて改善し、この扱い易さが、長期間、例えば、処置後1ヶ月まで持続でき、自宅での日常行為、例えばシャンプーした後でさえも持続できる手段を提供すること。【解決手段】(1)少なくとも1種のアミノシリコーン化合物及び(2)少なくとも1種のポリ(カルボジイミド)化合物を含む組成物であって、アミノシリコーン化合物の量が、組成物の合計質量に対して3質量%以上である、組成物。【選択図】なし