Stone Island Sweatpants in Black. A casual silhouette given a premium Stone Island update, the ever-reliable, all-black sweatpants are interpreted by the Italian label for the new season and they certainly do not disappoint. Made from pure cotton, these joggers fasten at the waist with a drawstring that locks in the fit, elsewhere, two side pockets, a cargo pocket and a back addition provide ample space for all your items while the compass logo gives away the designer status at the thigh.