Technical parameters： unfolded dimension: (L*W)82*77cm self weight: 2.5kg Provides both immobilization and comfort with a built-in plywood spine along the back. It is applied to rib injured. Three colors body straps with quick-clip, snap-lock buckles make it simple to apply in low light or cramped areas. When used in conjunction with a cervical collar. It provides immobilization in a sitting position until patient can be transferred to a long spine board. Comes complete with two reusable, plastic-coated, head/chin straps, neck pad and durable carrying case.