Tush Cush Orthopedic Seat Cushions are scientifically designed to relieve and prevent back pain, numb buttocks and other discomforts associated with sitting. This is done by suspending the tailbone (coccyx) in the air by reducing the pressure on the lower spinal discs; tipping the pelvis forward to help restore the spine's natural lumbar curve. Providing excellent seating comfort. The cut-out section of the cushion allows comfort and relief of pain to other areas sensitive to sitting.