Effax Horseboot Miracle. Keep your horse boots or synthetic leather squeaky clean with the Effax Horse Boot Miracle. Perfect for cleaning a variety of materials, the Effax Horseboot Miracle works on synthetic or patent leather and even rubber surfaces. Horseboot Miracle removes stubborn dirt whilst providing a caring action to eventually restore the colour of your dirty items. Not only does Effax Horseboot Miracle leaves tack and boots looking brand new, but the cleaner also helps to repel dirt and helps to protect tack and boots from dampness and wear and tear.