YSL Grain De Poudre Matelasse Chevron Monogram Shopping Bag Black. This is an authentic SAINT LAURENT Grain De Poudre Matelasse Chevron Monogram Shopping Bag in Black. This bag is crafted of grained calfskin leather. The shoulder bag features polished gold chain shoulder straps with leather shoulder pads and a crossover strap with a weighted gold monogram logo. The top opens to a black fabric interior with a zipper pocket and a center zipper compartment. Some wear and tear throughout. Comes with the dust bag