SPGOOD Balance Cushion 34cm with Pump Massage Mat Yoga Mat Inflatable Anti-Slip Stability Board for Fitness, Posture, Massage, etc. (Blue)

Seems to do what is intended. Too soon to see if it works to relieve low back pain on a permanent basis.

My husband had a knee surgery recently and he asked me to order this balance cushion for his exercises. It arrived quickly, was easy to set up with the pump provided. Very helpful tool for exercises.