... What is Jack's casual style....
I have to think about this. I feel like he's definitely the type that has a style. He's not messy. He's not lazy. Dude knows he's a pretty boy and this isn't something that generally bothers him. He's confident in himself most of the time. I think he's the type that's very like-- underestimate him because of his looks and he'll be like :) ok you keep saying that. :) you're right. You have nothing to worry about :)
Anyway I think he's got a style I just have to think about what it is.