Kendo Tenugui 1. Features A Tenugui (Bandana) And Medium Lenght Hair Behind. Please Try It Before You Buy! No Refunds!! Please Leave Reviews Below And Concerns On My Page. "Osu No Seishin". A Tenugui is a thin Japanese hand towel made of cotton. It is typically about 35 by 90 centimeters in size, plain woven and is almost always dyed with some pattern. The tenugui are still popular as a head covering in kendo, where it functions as a sweatband, as extra padding beneath the headgear (men), and to identify the participants by team color.