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The Sienna schooling shirt with 37.5® technology gives ever rider that classic, yet sporty look that will never go out of style. 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!).
• 37.5® thermoregulation technology
• Main body fabric has UPF 50 sun protection
• Tonal mesh underarm panels
We charge a flat rate of $12 USD on all U.S. orders under $100 USD. We offer free shipping on all U.S. orders of $100 USD or more.
We charge a flat rate of $45 USD on all Canadian orders. Canadian orders may be subject to additional customs fees/duties.
See our full Shipping Policy for more details.
Equine Essentials stands behind every item we sell. If, for any reason, you’re not completely satisfied with your purchase, you may return it to us for an exchange or refund, subject to eligibility. See our full Return Policy for more details.
We accept Visa, MasterCard, American Express, Discover, Diner's Club, Shop Pay, Apple Pay, Google Pay, and Meta Pay. You may also check out using PayPal.