Exos® FORM™ II 637 Back BraceEXOS FORM II 637 The Exos FORM II 637 provides a higher degree of spinal support and relief from a wide range of indications from acute lower back pain to post operative support. The Exos FORM II 637 provides superior sagittal and coronal control and support from T9 S1. Benefits V STX Material A patented, thermoformable material used with the posterior, anterior and lordotic inserts, allows for true customization and ideal patient fit. ComfortCORE