Find ISABEL MARANT Oskan Moon Shoulder Bag on Editorialist. The ISABEL MARANT OskAn Moon Shoulder Bag is crafted from calf leather. It features gold-tone hardware, gold-tone stud detailing, an embossed logo to the front, an adjustable detachable shoulder strap, a top zip fastening, and a main compartment. The bag can be worn on the shoulder or crossbody.