Abstract: A portable restraint device for a commuter to retain balance on a public transportation vehicle. The portable restraint device wraps a hook around a horizontal, vertical, or ring-shaped grab bar on the train or bus. The hook may be shaped like a hook, or operable as a carbiner, and is configured to adjust and securely attach to a variety of grab bars on public transportation vehicles. The opposite end of the portable restraint device includes a loop, configured for a hand to grip. The loop is often a flexible meshing material designed for comfort on long commutes. By gripping the loop, the commuter avoids contact with the grab bar surface, thereby avoiding germs. A handle secures the hook to the loop. However, the commuter is also able to grip the handle to retain balance. After the commute finishes, the commuter disengages the portable restraint device from the grab bar.