FLEX™ PACKStay Light. Stay Ready. Stay Moving. The FLEX Pack is Arsenals most versatile hybrid lumbar pack, designed for hunters who demand mobility without sacrificing essential gear capacity. Combining the comfort of a lumbar design with the utility of a backpack, the FLEX Pack ensures quick access to your equipment while maintaining a low profile silhouette. Key Features: Air Foam Mesh Comfort SystemPadded shoulder straps and back panel with breathable mesh