Using NASA-approved Outlast technology, Tempagenix' s Temperature Regulating Shirt, adapts to fluctuations in your temperature for an unmatched and innovative approach to maximum comfort. It's the ultimate in activewear with fabric designed for NASA spacesuits where temperatures change by 500 degrees. Our fabric uses Phase Change Materials (PCM) to absorb, store and release heat to achieve an optimum heat and moisture management. This gives our shirts the ability to continually regulate the skin's microclimate. As your skin gets hot, the heat is absorbed and as it cools, the heat is released. Tempagenix Temperature Regulating shirt provides a proactive prevention of sweating, significantly reduces sweating, regulates body temperature, is plant-based, and NASA approved. An independent study has shown up to 48% less sweating while wearing this material. Tempagenix provides clothing that is BETTER than wicking by PROACTIVELY managing your body temperature, preventing sweat buildup.