Rikishi (sumo wrestler) wears a thick belt made of silk that is about 10m long, repeatedly wrapped around the rikishi and fastened in the back by a large knot. It is tied very tightly so that the wrestlers may lift up each other with better grip during many maneuvers.
Photo Credits: narvii.com
Photo Credits: wsj.net
Rikishi also wears decorative tassels made from the same material as the mawashi.