Abstract: A wind and mud deflector mounts by a strap arrangement to the chest and shoulder area of a race horse to render the chest area more aerodynamic and to deflect mud or debris from the chest and shoulder areas. The deflector is formed of a relatively thin flexible sheet material including a wedge or pointed forward section leading to side panels positionable on opposite sides of the horse. The panels include a neck recess and shoulder recesses for loosely receiving the neck and forward shoulder areas of the horse. The strap assembly is used to secure the deflector to the horse and hold the deflector such that the neck and shoulder recesses remain properly positioned. A pad is provided about peripheral edges of the deflector to avoid chafing.