This Iaido Package includes Quick Dry Iaido Gi and Hakama and both are made of Toray's patented polyester named Cubic Sensor®. This Cubic Sensor® is the scientific material that eliminates the perspiration-induced stickiness and clinginess of traditional materials. The surface of the Cubic Sensor® fabric absorbs, disperses and evaporates perspiration from the skin, thus providing a refreshing feel during exercise. If you are getting drenched with sweat during your Iai practice and/or if you would like to exercise more comfortably, it's worth of trying this new Quick Dry, Cubic Sensor® Iaido Gi & Hakama package.100% polyester(Cubic Sensor®)