Shop the Prada Vintage Pre-owned Cotton Button-Down Shirt in Brown. This one-of-a-kind piece from Prada is a classic brown shirt made of 100% cotton. With its great fit, collar, front button fastenings, long sleeves, and two pockets, it`s the perfect addition to your wardrobe. In excellent condition, this shirt has been extremely well maintained and shows no signs of wear. Available in US size 15.5/M.