Bit

   The metal mouthpiece on a bridle, to which the reins are attached.

   Blinkers

   The flaps on a bridle which stop a horse from seeing backwards or sideways (unautorized in competition).

   Breeches

   Trousers worn specifically for riding.

   Bridle

   A harness that fits around a horse's head, holding the bit.

   Hunting stock

   A broad band worn around a rider's neck.

   Saddle

   The seat for the rider on the back of a horse.

   Spur

   A pointed device attached to a rider's boot heel and used to encourage a horse.

   Whip

   A long, thin, hand-held device used to encourage a horse.

Credit: IOC

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