By Rachel Huber
If there's one thing that never goes out of fashion, it's giving to a good cause. No wonder then that this autumn, designers from Paris to Milan, London to New York, have rolled up their sleeves to prove that not only has philanthropy never been so fashionable but that designer collaborations can have style and substance. Just in time for the season of giving, we take a look at the best and the most beautiful charity partnerships to hit the pages of Vogue.fr.