5.11 Tactical Flex Medium GP Pouch5. 11 Tactical Flex Medium GP Pouch Load up what you need before rolling out or storing it away. The PU coated, water resistant (N219 mini ripstop) walls will contain anything that doesnt have its own teeth or a chainsaw and the will to carve its way out. The Large Convoy Packing Cube holds 400 cubic inches worth of material, has a full mesh back wall to identify whats what, and a grab handle to heft it where it needs to go and expands by 3 when