Soft hair is "des cheveux doux" in French.
cheveux
cheveux means hair in French.
elle a les cheveux (colour) = she has (colour) hair
la couleur des cheveux
Hair is plural in French:de beaux cheveux You have beautiful hair: vous avez de beaux cheveux What a beautiful hair: quels beaux cheveux
Tu n'as pas de cheveux (or Vous n'avez pas de cheveux).
un cheveu raide (singular), des cheveux raides (plural)
``Elle a des cheveux blond``means :``she has blond hair
Les cheveux (masc.) mean the hair in French. This is the plural form of "un cheveu" (One hair).
Literally 'bon cheveux' means "good hair" in French, but this isn't used at all in French. 'Beaux cheveux' means "nice / beautiful hair".
"J'ai les cheveux verts" means "I have green hair" in French.