Jace wears the standard Canis uniform with the addition of a hooded blue cloak, as seen in most of his icons. His hair is long enough that he has to tie it back; like most people in Sabra, he could use a haircut; he's probably done something with it a time or two. There's a sapphire set in one of the materia slots in his bracer, and he's wearing a medallion with this symbol under his shirt; only really relevant if you see him shirtless.