A sun care preparation containing a dermatologically acceptable organic carrier, a UV ray absorber, and an SPF enhancer, wherein the SPF enhancer is a monoethylene unsaturated carboxylic acid core monomer and a nonionic ethylenic non-eline. A core containing a polymerization unit of a saturated core monomer, an inner shell containing a polymerization unit of a nonionic ethylenically unsaturated inner shell monomer, a monoethylene unsaturated carboxylic acid inner shell monomer, and an aliphatic inner shell monomer, and a nonionic Multistage polymer particles having an outer shell containing a polymerization unit of an ethylenically unsaturated outer shell monomer, an aliphatic outer shell monomer, a monoethylene unsaturated non-carboxylic acid outer shell monomer, and an ethylenically unsaturated surfactant outer shell monomer. A sun care formulation comprising, the core containing cavities upon drying, and the multi-stage polymer particles having an average particle size of 50-1,000 nm upon drying. [Selection diagram] None皮膚科学的に許容される有機担体と、ＵＶ線吸収剤と、ＳＰＦ増強剤とを含むサンケア製剤であって、ＳＰＦ増強剤は、モノエチレン性不飽和カルボン酸コアモノマーおよび非イオン性エチレン性不飽和コアモノマーの重合単位を含むコアと、非イオン性エチレン性不飽和内殻モノマー、モノエチレン性不飽和カルボン酸内殻モノマーおよび脂肪族内殻モノマーの重合単位を含む内殻と、非イオン性エチレン性不飽和外殻モノマー、脂肪族外殻モノマー、モノエチレン性不飽和非カルボン酸外殻モノマーおよびエチレン性不飽和界面活性剤外殻モノマーの重合単位を含む外殻とを有する多段ポリマー粒子を含み、コアは、乾燥時に空洞を含み、多段ポリマー粒子は、乾燥時に５０～１，０００ｎｍの平均粒径を有する、サンケア製剤。 【選択図】なし
