He soon realized the (Kinetic Localized High-intensity System) was designed by his grandfather, a retired postal engineer, to help people navigate the world faster. But the jacket had a mind of its own. It changed its "zip" based on Leo’s needs:
If he zipped it all the way to the chin, he became nearly invisible to those around him, a ghost in the machinery of the town. KLHiS zip
When he entered a new zip code, the jacket adjusted his speed to match the pace of the city. a retired postal engineer