WISS+ Willner Instrument for Spinal Study + Stabilization Take a new look at assessment & management of long term low back pain An assessment tool and pain management system combined into one orthosis. WISS+ transfers the proven principles of the WISS Instrument into a low profile, lightweight, functional spinal orthosis patients can wear - day or night. - As an assessment tool... - As a pain management system... - And, for patient compliance...... WISS+ Leaflet WISS+ Instructions WISS+ Manual