The Horseback Warmer covers important muscles in the back and lumbar region. The Warmer is intended to achieve a more supple back for the horse overall, and is good for use on a horse that has localised issues in the back or where the quarter muscles originate. It is excellent as a preventative measure against injury applied before and during competition, and exercise sessions. *Not designed to be ridden in, the top line is straight *Please note this is not a plug in product https://botcanada.com/ sizing charts can be found https://botcanada.com/sizing-charts/