The RJ Classics Maddie Junior 3.75 Show Shirt is the perfect horse show shirt for girls with polished style and performance fabric technology. The Junior Maddie hunter jumper long sleeve show shirt has patented 37.5 heat regulating technology that works for the life of the garment. Designed for athletes, the naturally derived particles help the rider maintain an ideal 99.5 degree Fahrenheit/37.5 degree Celsius core body temperature. This has been proven to maximize stamina and athletic performance. Besides giving competitive young riders an edge while showing, the Maddie Jr Show Shirt is very comfortable and professional looking.