Exos® FORM™ II 631 Back BraceExos FORM II 631 Back Brace The Exos FORM II 631 provides a higher degree of spinal support and relief from a wide range of indications from acute lower back pain to postoperative support. The Exos FORM II 631 provides superior sagittal control and support from T9 S1. Benefits V STX Material A thermoformable material used with the posterior, anterior and lordotic inserts, allows for true customization. ComfortCORE Foam Conforms to the unique contours