Zero History operative Milgrim is kept on a tight leash by his handler Ollie Sleight. He supplies Milgrim with nothing but an unusual phone and what he calls a “Faraday pouch” for carrying his passport.

Radio-frequency identification tags. They were in lots of things, evidently, and definitely in every recent U.S. passport…You could sit in a hotel lobby and remotely collect information from the passports of American businessmen. The Faraday pouch, which blocked all radio signals, made this impossible.

The pouch plays a role in Milgrim’s evolution as his involvement in corporate espionage deepens.