The back support belt provides stable support for the lower back and reduces strain on the upper body. This is an essential item for big game fishing, from GT casting to bluefin tuna and standing marlin. The waist area is moderately hard, so it is designed to be less prone to deterioration over time. The mesh processing on the back reduces stuffiness in the summer. The anti-slip processing keeps it in place even during long fights. By attaching the spinning harness (sold separately), you can release both hands during the fight, which helps reduce forearm fatigue. The spinning harness hook is designed to be quickly removed from the reel belt to prevent accidents during the fight.