According to the manufacturer, this device increases average speed by 150%.
swim-man1-1107.jpg
Illutration by Translucent.de
Below are some videos of a similar device in use underwater:
According to the manufacturer, this device increases average speed by 150%.
swim-man1-1107.jpg
Illutration by Translucent.de
Below are some videos of a similar device in use underwater: