Sneaker martketplace StockX is partnering with top celebrities to offer rare — and in some cases, one-of-a-kind — sneakers straight from their personal collections, and it’s all for a great cause. In response to Hurricane Harvey and Irma, StockX has launched a relief campaign spearheaded by Eminem with contributions from over a dozen more names including Karlie Kloss, Pharrell Williams and LeBron James.