Mobile pochette 'cartable' S.BlackDESCRIPTION PATRICK STEPHAN Collection. a sacoche style bag designed just to carry a smartphone The front main pocket can be opened and closed with a lock, and there are two slots on the backside. This makes it possible to charge your smartphone while carrying around a mobile battery. This is a convenient item that can store not only smartphones but also small wallets, keys, and small cosmetics. The length of the belt can be adjusted by adding a ring.