His hair is "ses cheveux" (masc.) in French.
a hair bun is 'un chignon' in French.
Long hair is "les cheveux longs" in French.
'messy hair' in french is 'cheveux en désordre'
ginger hair is 'les cheveux roux' in French.
Il a les cheveux gris is how you say he has grey hair........
les cheveux
mes cheveux
les cheveux
Coiffeur
An hair tie is "un élastique à cheveux" in French.
des cheveux raides
"J'aime tes cheveux." = "I like your hair."