Some articles on satba:

Ssireum - Method of Competition
... position (baro japki), each grabbing a belt—known as a satba (샅바)—which is wrapped around his opponent's waist and thigh ... The wrestlers then rise while retaining their hold on the other's 'satba.' The match is awarded to the wrestler who forces the other contestant to touch the ground with any part of his body at knee level or higher ... The use of "satba" was invented with the birth of professional Ssireum in the mid-20th century ...