This multi-adjustable postural support back features a three-section modular shell with a dual-density cushion combining viscous gel and polyurethane foam. It is designed to contour closely to the user’s spinal shape, allowing precise adjustment to accommodate kyphosis and other spinal deformities. The design provides targeted, aggressive support to the PSIS, supporting clinicians to establish and maintain optimal or neutral pelvic positioning through a structured, step-by-step adjustment process. This makes it well suited for complex postural needs requiring progressive correction and long-term support.