Arencia's Fresh Cleanser [Green] is a 120g jar of soft green paste — the format Korean shoppers call tteok-sop, soap with the consistency of rice cake — and its ingredient list explains why people treat it as two products. Glycerin comes first, before water. Sodium cocoyl isethionate, the mildest surfactant in common use, comes third. Then sweet almond seed meal, rice powder and kaolin clay, which is what turns it into something you can leave on the face as a short mask before you foam it off. One reader has spent two months using it that way as an evening wash.

Korean name: 아렌시아 프레시 클렌저 [그린]
Size: 120g