smarthanger / hanger

Almost individual has this experience which feel some cold from less dried clothing. So, we are asking to us this question.
'Is there any method to notice whether my clothing be dried perfectly or not ?'
This question has been solved by chloride cobalt paper. So we made suggestion to make new design hanger.

We are considered about convenience thus we used original hanger design.
We should consider chloride cobalt paper's corrosion so we made paper case,
cap and the button to devide.