Swim suit

   Swim suits shall be suitable for a sports event and shall be non-transparent.

   Pool

   The pool must be a minimum of 20m by 30m, and within that a 12m by 12m area must be at least 3m deep. The water temperature must be 26 degrees Celsius, plus or minus one degree.

   Underwater speakers

   Used to project music underwater.

   Goggles

   Goggles and additional clothing is not permitted.

   Nose clip

   A small clip of hard plastic or wire with a thin rubber coating, used to stop water from entering the nose during underwater movements.

Credit: IOC

For further info., please visit http://www.olympic.org/uk/sports/programme/disciplines_uk.asp?DiscCode=SY.