SCRATCH production role

As for this project, I am in charge of costumes, hair/make-up, and production manager. I've been looking through some clothing websites such as GAP, Old Navy, Pac Sun, American Outfitters, H&M, Express, A&F, Hollister, American Eagle, Eddie Bauer, JCrew, etc. Then, I realized that all these clothing stores were hip and fashionable. For the character, Geoffry I need something that is out of style, but still hip. The style I was thinking of was Michael Cera in Juno and Superbad. I imagine Geoff wearing a zip up hoodie with jeans. No accessories, maybe a watch. I also think he would be wearing Converse shoes or perhaps flip flops. I think this would give the image that he is someone who is intelligent but somewhat dorky. As for Jack, I can see him wearing brand name jeans, a buttoned down shirt with the sleeves rolled up, and casual shoes, perhaps Sketchers. His hair would have to be done, or naturally curlely. Jack would just have to look like he at least made some conscious decision on what he wears. As for Niki, I am still not too sure what she would be wearing, and since I don't really know what and why girls wear certain things, so I will need some help on that. I also have no idea on how to apply make up or which ones to use, so that will be fun to learn haha.