"Navajo" Fashion Spread in Seventeen
They still rely on generalized Native stereotypes, but this time are referring to a specific culture. This points to the fact that in the collective American consciousness, all tribes are interchangeable. Navajo, Ojibwe, Kootenai, take your pick. They're all the same! For instance, dream catchers: definitely not Navajo. Would I still be upset if they had paid attention and made taken inspiration from actual Navajo culture? Like if they had a white model dressed up in a rug dress? Of course. But hopefully you see my point.
If this were just a "tribal fashion" spread without the dreamcatacher, I wouldn't consider it offensive. I don't think it's wrong to wear clothes with Native designs. Problems arise when the fashion is overly stereotypical (e.g., with feathers and fringe) or when someone misidentifies it.
For more Native-style fashion, see Aztec, Inca, and Avatar-Inspired Fashion and Audigier's Stereotypical Fashions.