This is an authentic PROENZA SCHOULER Calfskin PS Courier Backpack in Heather Grey. This stylish satchel is crafted of lovely smooth calfskin leather in dark grey. This stylish backpack has matching leather shoulder straps, silver links and an extra long facing flap with hanging straps and a silver switch lock. This opens to a spacious black leather interior. Follow this item for alerts. Proenza Schouler is a registered trademark of Proenza Schouler. FASHIONPHILE is not affiliated with Proenza Schouler.