1Three adjustment light type, comfortable and skinfriendly, two keel support bar on both sides of the back, give back balanced pressure. 2Yshaped adjustable back strap, easy stretching, simple operation, move up and down to fit the body. 3Aluminum alloy keel support bar, support the overall structure, strengthen the back shaping strength. 4Independent shoulder pads with flip forward and crossed wing, prevent underarm friction damage. 5Strong hook&loop design, good stickiness, nonslip and not easy to fall off.
