The Piggyback bag mounts to the compression straps with belt loops, so light loads can be carried without compression. We call it the “Piggyback” because it has no straps of its own, and has to hitch a ride on something else. The compression-strap mount allows the bag to be positioned wherever you want it, including as an extension to the Shadow Pack. Designed as a breathable bag – all sides are made of a durable mesh. The Piggyback comes included as standard on the Classic and Elite models, in a face color to match your pack, though you can also order additionally, if required. Orders posted after purchase of an Elite or Classic will come in Black.