I will say few words, cause I'm Polish.
On her mother's agency facebook, it's been written that she became a face of Belstaff on upcoming season.
This jacket was sponsored by Jac with her signature (but jacket is from Belstaff's company). She and her mother agency are taking part in "WOŚP" (it is charitable foundation, they collect money every year especially for sick children), and this jacket and other staff (Jac's photos with her autographs) are going on auctions. All money will go to "WOŚP" and needy people.
In my opinion, it is so incredible generous and good-natured. I'm elated, that Jac is taking part in such a great project.