Xylitol Cool gets its name and its cooling effect from xylitol, which is a naturally-occurring sweetener found in certain fruits, vegetables and plants. Originally developed in Finland from birch trees, xylitol has been used as a sugar substitute for food and chewing gum for decades.

Together with a similar natural substance called erythritol, xylitol can be transformed into an environmentally-friendly, non-toxic heat-beating fabric finish.