A Yukata Summer kimono
A yukata is a Japanese garment, a casual summer kimono usually made of cotton. Though their use is not limited to after-bath wear, yukata literally means bathing clothes (浴衣).
The left side of the yukata is wrapped over the right side (commonly reversed with right over left when dressing for a funeral) and secured with an obi sash tied in a bow and placed in the back. Traditionally bows in the front represented a prostitute.
The following is the most popular "Butterfly Tie" that results in a lovely bow in the back.