The Halo Safety Ring, the only patented institutional bed mobility device that prevents lateral mattress movement, and gap space in the most critical zones: 1, 2, 3, & 4. The Halo Safety Ring meets and exceeds the HBSW and FDA's final dimensional guidelines against bed entrapment. The Halo Safety Ring passes the new "Bed System Measurement Device" pass/fail test that has been approved for Bed System testing by the FDA and state surveying teams. Provides exit points for neck, head, & chest and eliminates the four most critical zones of entrapment. Meets FDA guidelines for patient transfers & therapy bedside assistant for both patient transfers & therapy. Promotes bed mobility & increases environmental independence. Prevents lateral mattress movement and gap space elimination in the most critical zones: 1, 2, 3, & 4.Please contact us if you are unsure if this will fit your bed.