A spinal immobilization device including a base member and a spiral support member configured to overlay the base member. The base member includes an elongate board having a curvate top surface, a plurality of openings surrounding at least a portion of the elongate board, and a channel defined within the top surface. The spiral support member may include a bladder, a valve controlling passage of fluid into the bladder, and a plurality of fluid absorbing members within the bladder. The channel defines an impression within the top surface that matches a shape of a portion of the bladder.
