jockey
Person who rides a racehorse; a jockey rides with very short stirrups and the body hunched over the horse’s neck.
saddle 
Slightly curved part that is usually made of leather; it is laid on the horse’s back for the jockey to sit on.
riding cap 
Hard piece of equipment designed to protect the head.
shadow roll 
Part that blocks the horse’s view of the ground; this prevents the horse from mistaking shadows for obstacles to jump over.
rein 
Strap that the jockey holds to control the bit to steer the horse.
riding crop 
Thin flexible stick that the rider uses to spur on the horse.
girth 
Strap around the horse’s belly that keeps the saddle on its back.
saddlecloth 
Padded piece of cloth underneath the saddle that protects the horse’s back from chafing and protects the saddle from the horse’s sweat.