Pey'j originally created the Jet-Boots as a new means of personal transportation, but don't work as planned due to 'bugs' that Pey'j still needs to fix, however it turns out they are more useful as they are.
Pey'j relies mostly on the Jet-Boots he created to execute powerful ground pounds. This causes enemies to bump into the air, making them more vulnerable to Jade's attacks. The Jet-Boots are powered with home-made bio-carbonate, stored in a pocket of pressurized methane on the back of his pants. On the soles of his shoes are two turbo-reactors that activate whenever he contracts his abdominal muscles.
Pey'j mentions that the Jet-Boots are the result of a life's work and took two years to build and finalize.