This is a Vertx known as the Dead Letter Sling Bag, model F1 VTX5008 IBK/MRD.
This mid-sized sling works and plays large because of the versatility built into every critical feature. The Dead Letter Sling's appearance and functionality can be modified in seconds to adapt to your immediate needs. Multiple carry options let you move confidently and discreetly on the street with invisible CCW and ballistic panel capabilities as well as a full complement of office-friendly aesthetics and organization.
Features:
YKK Self-Repairing Nylon Coil Zippers
Bonded Nylon Thread Throughout
Critical Seams and Attachment Points Bartacked for Extra Durability