The Inflatable Pants are a variation of normal pants created by Patrick Star. As the name implies, the pants inflate.
Role in the series
The pants first appear in "Patty Hype" and seem to be activated by a pull-switch that triggers its wearer to have the pants lift them aloft, only to flip upside-down because of the weighted pressure, as demonstrated by Patrick. The first version of the pants had the ability to irreparably burst off the wearer, upon their request.