Walking Calvin Klein for a model spells value for her career in many ways, two of which are:
1. Highly Efficient Go See--Gets the attention of influentials in minimal time. A runway show is like a super efficient "Go See", where the model goes to see not just one possible client--one at a time, but hundreds. And in the case of Calvin Klein, those people mark the creme de la creme of the fashion world.
2. High face recognition--the girls faces aren't disguised behind a mirage of makeup, hair accessories, or masks. This improves her chances of facial recall for future castings.
Jessica walked 2 looks in her exclusive for Calvin Klein, past exclusives have included Natalia Vodianova, Karlie Kloss, and Lara Stone.
On a lighter note, I tawt I taw Jessica wearing a Tweety Bird shirt :)