This invention relates to a method to determine the drying and water resistance of the fiber, in particular a mobile user to easily be the size of the case side to the sensor for sensing the amount of water present in the fiber (cotton) by contact with a fiber rod, and means for controlling to show the amount of water detected by the sensor rod which, provided on the front of the case The outside of the moisture to discharge rapidly into the surface layer 13 from the back layer 12 to configure the means for indicating the amount of moisture detected by the sensor rod in perspective and audio absorbs sweat inside the back layer (12 ) to prevent infiltration and ventilation and also by enabling you to simply test whether the dry state of high performance fibers that have to be astute consumers to easily check the wear clothing made of functional fibers are fibers that function to the user or audiovisual so will you.
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