The team has developed flexible, lightweight nonwoven fabric materials that can selectively determine physiological information from sweat forming on the surface of the skin. The technology is the first nonwoven fabric sensor to provide real-time information regarding hydration levels during exercise or training through selective determination of sodium ion levels. As sodium ion levels in the sweat increase, athletes must replace these electrolytes to remain hydrated. These dehydration patterns are unique and vary based on diet, weather conditions, and human physiological cycles. Therefore, there is not a “one size fits all” hydration program. The ability to monitor an individual’s hydration parameters is unique to the RooSense sensor and gives it a competitive advantage over “sweat monitors” that monitor water lost or rudimentary “water timers” that remind the athlete to drink water every 20 minutes.