The Car-Cush orthopedic seat cushion is scientifically designed to relieve and prevent back pain, numb buttocks and other discomforts associated with sitting. The unique cutout section of the cushion suspends the tailbone providing comfort and relief to areas sensitive to sitting. Wedge shape tilts your pelvis forward to restore your spine's natural lumbar curve. Product Features Suspends the tailbone in air, which reduces the pressure on and within the lower spinal discs Causes the pelvis to tip forward to help restore the spine's natural lumbar curve Provides excellent sitting comfort. The cutout section of the cushion allows comfort and relief of pain to areas sensitive to sitting 13" x 16"