I can only describe as this stuff "Killer Hair". In the application I have kept to the enclosed leaflet for instructions (English), but the Ergebnus missed its targets to distances. The Relaxer is extremely aggressive, attacked my skin properly. Despite maintaining the exposure time my hair was massively overused and are totally destroyed. Blow drying is no longer there, because otherwise the hair matted. Simple air drying is also inappropriate, my hair are otherwise in all directions and stay that way, not matter what I do. They are so destroyed that there is no rinsing or cure that can fix anything on it. When wet, it can be like rubber pull, break, tear off and fall out. The real solution is complete down to the fact that new (Hoff finally healthy) hair can grow back. My hair are very important to me, so I comb it after washing and pull a cap on, so that they are smooth and must also sleep with this cap. Before you buy this product, please talk beforehand with your hairdresser about it and let it to you also apply only from him.