A mawashi is a traditional belt worn by wrestlers in the sport of sumo. It is typically made of thick cotton or silk and can be several meters long. The mawashi is wrapped around the waist and secured in place, providing support and modesty during matches. In addition to its practical use, the mawashi also has cultural significance in Japan. Different colors and styles can indicate a wrestler's rank or status within the sumo hierarchy. Wrestlers often wear a mawashi during training and competitions, making it an essential part of their attire.