GSAHEAT+ is a high performance thermal fabric that provides maximum insulation from cold and provides thermal protection and heat loss resistance. GSA HYDRO+ is a high performance fabric that ensures that skin remains moisture free during exercise. ORGANICPLUS+ certifies the use of 100% pure natural organic cotton. All SUPERCOTTON™ products are made from combed cotton yarn which is why they are so soft and gentle on the skin. GSAAERO[+] series provides excellent ventilation & breathability during exercise.