Although they are most famous for being hypo-allergenic, Curly horses have many other exceptional features. Nature has provided these horses with a unique heating and cooling system. Their thick curly winter coat repels rain and snow. Underneath, air is trapped near the short hair coat next to the body, keeping them warm. They are able to withstand cold winters, and can stay outside year-round. In the spring, they shed their coats. Their hooves are extremely hard and do not require shoeing. Curlies come in all colours, plus they may also be appaloosa, pinto, tricolour, etc. The coat can range from a crushed velvet look, to a gentle wave, to tight corkscrew curls over the entire body. Their thick manes often appear wavy.