Girls RJ Classics Sienna Jr 37.5 Training Shirt
The Girls RJ Classics Sienna Jr. Training Shirt with 37.5 technology gives young riders the same contemporary style and performance boost that women enjoy with the Sienna Shirt. The Sienna Junior has the 37.5 patented heat regulating technology to help manage core body temperature and increase stamina. Girls Sienna Jr. Training Shirt from RJ Classics has mesh panels for increased airflow and plenty of stretch for comfort.
- 37.5 thermoregulation technology
- Main body fabric has UPF 50 sun protection
- Mesh underarm panels
- 44% Polyester / 44% 37.5® Polyester / 12% Spandex
RJ Classics has added 37.5 technology to training shirts and show shirts because it's proven to support athletic performance. When core temperature is 37.5° Celsius (99.5° Fahrenheit) the athlete can deliver their best effort and maintain stamina. The naturally derived particles are a permanent part of the fabric and never lose potency. Girls Sienna Jr 37.5 Training Shirt has a quarter zip, flattering fit, is breathable and wicking, and helps reduce odors. Fashion savvy kids will also appreciate the beautiful colors with either tonal mesh or patterned mesh inner sleeves.