A classic schooling shirt with a twist! The Ella Training Shirt has been updated with 37.5® technology. This patented thermoregulation technology has proven to help your body manage its core temperature and therefore, increase stamina. It keeps you comfortable by helping your body to maintain an optimum core temperature of 37.5° Celsius (99.5° Fahrenheit) which is ideal for peak athletic performance. The particles are naturally derived and work for the life of the product (it will never wk.ash out!). The signature mesh panels give the Ella her unique, updated look and help you stand apart while maintaining a polished look.