Inner tube water polo (ITWP) is a variant of water polo with the important difference that players are required to float in inflatable inner tubes.
By floating in an inner tube, players experience less contact and expend less energy than traditional water polo players, not having to tread water.
This sport is predominantly played at universities,[1] but can also be found in recreational adult leagues.
The goalkeeper position is played differently, depending on the host leagues rules.
Finally, some leagues require the goalkeeper to play with an alteration to their tube.