The basics Schwarzkopf OSiS Refresh Dust is a hair refreshing and volumising dry shampoo which applies in a workable and lightweight powder spray. The benefits Offers light style control and separation while providing incredible volume for your client's style. The uses Use it to create volume, texture and to refresh a style as well. The bottom line Schwarzkopf OSIS+ Refresh Dust is a dry shampoo that comes as a sprayable powder.