The ultimate piece for riders who expect performance from every layer. With a body-hugging fit, seamless knit fabric, and strategic venting, the Sustain Baselayer keeps up from warm-up to cool down. Product Features : AriatTEK® is designed for optimal comfort in any weather, with built-in performance features that adapt to changing conditionsClimateTEK™ dynamically responds to your body temperature to keep you cool when things heat upFreshTEK™ odor control helps keep you feeling fresh through long hours of wear Women's Sustain Baselayer in Navy NylonElastane, Size: XS by Ariat