Warm legs are more flexible on the inside and this can lead to pulled tendons and damaged ligaments so this cooling gel is a great way of keeping your horse's legs cool during or after exercise, stabling or travel. Unlike other cooling gels in the market, Keratex Cooling Gel actually cools by evaporation, making it extra effective and completely unique in the way that it works. Keratex Cooling Gel does not contain menthol or camphor. Menthol and camphor simply temporarily numb the hot nerve receptors, which in turn enhances the cold nerve receptors, so the horse, and the person applying it, are given the illusion of a cooling effect. Keratex Cooling Gel will actually cool the legs with a marked difference in temperature, making it a safe and highly effective product.