Submission Grappling is a form of competition and a general term for martial arts and combat sports that focus on clinch and ground fighting with the aim of obtaining a submission through the use of submission holds. The term “submission wrestling” usually refers only to the form of competition and training that does not use a gi, or “combat kimono”, of the sort often worn with belts that establish rank by color, though some may use the loose trousers of such a uniform, without the jacket. Not using a gi has a major impact on the sport : there are many choke techniques which make use of the lapels of the gi, thus rendering them un-useable and grappling in general becomes more difficult when the opponent doesn’t have a gi tograb hold of.
From: https://en.wikipedia.org/wiki/Submission_wrestling
