The Span America-SC85V29 PressureGuard Span Care Convertible is a specialized version of the Span Care mattress, specifically engineered to fit recessed deck frames often found in acute care settings. This convertible system allows for a seamless transition between non-powered (static) therapy and powered (active) alternating pressure therapy by simply attaching a control unit. Its V-shaped or notched base design ensures a secure, flush fit within the frame, maintaining patient safety and proper alignment during bed articulation.