The Maddie Jr. show shirt blends cutting-edge technology with traditional styling to create the perfect synergy for our youngest R.J. riders. The fabric features 37.5® patented thermoregulation technology, proven to help your body manage its core temperature and thus increase stamina. It keeps you comfortable by maintaining an optimum core temperature of 37.5° Celsius (99.5° Fahrenheit), ideal for peak athletic performance. The particles are naturally derived and work for the life of the product (they will never wash out!). This style also offers multiple trim fabric options, textured mesh for added comfort and breathability, and a zipper placket with a snap collar to modernize this traditional look.