Looking for more storage on the VP2 or just a good accessory bag? This little bag is built tough and though simple in design, it's high in utility. Featuring a secure key clip, spandex storage pocket, and tough YKK zippers, this pack will take you places. It's easy to install too. Just undo the velcro back and slip through the top and bottle nylon webbing in the rear cargo area. Note this works great on the HydraQuiver Vest Pack 2 but can be used on the Double Barrel.
It works great as a small first aid kit, storage of headlamps, and other key items. Storage - 96 cubic inches of storage, 8" tall by 4" wide x 3" tall. Graphic shows once installed, you can still use the shock cord on the back for compression. VP2 obviously not included. 
Made in the Vietnam.