100% Cotton. A Tenugui is a traditional Japanese cotton gauze cloth used as a towel or head-covering. Ours features various images from the Billionaire Boys Club deck of cards. Made in the traditional fashion the ends of the Tenugui are UNFINISHED, and are intended to fray at the ends. These frayed ends can be trimmed with scissors and the fraying will stop, however frayed ends should never be pulled.