Abstract: A protective device is provided for carrying out a permanent wave with a permanent wave product on a hair solely in the vicinity of the root thereof and for protecting from the action of the permanent wave product the part of the hair which is not situated close to the root. This device includes a flexible and liquid-tight sheet (1), a reinforcement zone (2) extending along a first edge of the sheet and an arresting element (3) comprising an absorbent strip or pad along the opposite edge of the sheet. If further comprises a fixing structure, for example a strip carrying hook shaped elements situated on or forming the reinforcement zone (2) for temporarily and removably fixing the protective device to the hair prior to winding the device and the hair on a roller.