Amika Perk Up is a wash day extension. A buildable dry shampoo that revitalizes roots with scalp-friendly ingredients—boosting time (not buildup!) between wash days. For all hair types 1-4c, balanced to oily scalp Infused with good-for-scalp ingredients like mandelic acid + arrowroot powder, perk up plus extended clean dry shampoo allows you to go the distance between wash days with a lightweight, natural feel + finish. lightweight + invisible finish + no residue natural feel + finish: this lightweight formula leaves hair feeling clean, without a trace of residue or buildup