Bag-on-valve aerosol container defining a chamber, wherein a pressurized gas is contained, surrounding a flexible bag, and wherein a closable outlet is in fluid communication with said flexible bag, said flexible bag comprising a leave-on dermatological composition comprising:- an oil-in-water emulsion, comprising one or more oils, the emulsion having an oil phase to water phase ratio of between 1:1 and 1:25；- one or more oil-in-water emulsifiers； and- one or more active dermatological ingredients；wherein said leave-on dermatological composition has a viscosity at room temperature of between 1 and 20,000 mPa.s and wherein said product compartment further comprises one or more physical foaming agents having a standard boiling point of -50 to 70 °C.
