Replacement cummerbund if yours goes awry. Fills in the gap in an open-backed chair keeping your little 'un safe and on the seat; plus provides additional support for wrigglers when wrapped around baby and chair.
Equally brilliant at holding together all your shopping bags in the back of the car (to avoid them tipping), or for wrapping round an exploding suitcase. Velcro is industrial strength (don't wash with your tights!).
Ad hoc colours (not necessarily the pattern shown here).