The unusual sporting event was dreamed up by mastermind and organiser Dmitry Bulawinov.
He said the idea of floating down the river in the embraces of a rubber woman was conceived as a joke at a party where the men got drunk and the women didn't show up.
While considering the possible uses for a rubber woman on a camping trip, someone suggested that a sex doll would make a handy flotation device. Thus the 'Bubble Baba Challenge' was born.
Article with two more pictures