Skip to content
Horse Pilot Air Vests In Stock!
Horse Pilot Air Vests In Stock!

RJ Classics Sienna Jr. 37.5 Training Shirt

$65.99
icon of umbrella carrying a package
Flat Rate Shipping

See policy below

icon of hands holding a box
Free Store Pickup

Click and collect

icon of package with an arrow swooping around it
30-Day Returns

Learn More

Notify me when back in stock

chat bubble with heart
Headshot of customer

“Love. Love. Love. this tack store. employees are always helpful and they carry a wide selection of new items as well as consignment items. I can't say enough good things!”

Amy L.

The Sienna Jr. with 37.5® technology is the perfect schooling style for even our youngest of R.J. Riders. The 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 wash out!). Some colorways feature a unique patterned mesh, while others feature a tonal mesh.

 

• 37.5® thermoregulation technology
• Main body fabric has UPF 50 sun protection
• Mesh underarm panels


Liquid error (layout/theme line 298): Error in tag 'section' - 'sezzle-widget' is not a valid section type