The cuticle is the outer layer of the hair, his jacket, given the location in which it is located, is the first to be damaged when the hair is ill-treated with shampoos inappropriate, aggressive treatments, excessive brushing, etc..
Küünenaha on väliskihtjuuksed, oma jope, sest koht, kus ta asub, on esimene, mis on kahjustatud, kui juuksed on väärkoheldud koos šampoonid kohatu, agressiivne ravi, liigne harjamine, jne.