Zilco Webbing Side Reins - Rokko FittingsSide reins run from the bit or lunge cavesson to the roller. They are designed to encourage flexion and softness in the horse's mouth. Recommended for use by experienced handlers only when used improperly they can unduely restrict the horse's movement. This model is made from webbing with rokko buckle adjustment and has elastic panels with webbing loops designed to allow a limited amount of "give". Black One Size