RundleField bag is a versatile add-on and stand-alone bag. Equipped with carabineer rings it can easily attach to Copper Cherry backpacks. The Cadmus and Seymour have D-Ring attachment points and can also be attached to the straps for a chest bag. Can also be used as a travel drop kit or a small side bag. Good to fit a camera (add modular padding), your passport, wallet and go find some adventure.