TOUR MASTER/CORTECH SYNERGY VEST LINER 4XLTour Master Synergy Electrically Heated Riding Apparel Tour Master Synergy apparel is designed to operate from a vehicles standard 12-volt electrical system to provide unmatched levels of warmth and comfort. With Synergy apparel, wearers can be warm without the bulk and discomfort typically caused by excessive layers of clothing. By providing increased warmth and mobility in cold temperatures, Synergy apparel helps reduce fatigue wh (more…)