★4 sizes, 2 thicknesses for children of most body types and heights. ★It can be turned over at will, increase the space, and the cotton pad is comfortable to use. ★Large space, convenient for leg activities, no sense of restraint. ★Upgrade the shoulder strap, add cotton to widen, soft and comfortable. ★Skin-friendly and soft fabric, the dyeing process is environmentally friendly and the c..