Spinal Indications • Herniated Disc • Low Back Pain • Lumbar Instability • Compression Fracture • Spondylolysis • Spinal Stenosis • Degenerative Disc Disease Fea tures Flex Foam ® II The Flex Foam ® II design is fabricated with the frame sandwiched between a soft foam inner liner and firm foam outer liner. The inner frame can be fabricated with any desired plastic type and thickness for desired rigidity