GOMINIMO Memory Foam Seat O Shape Dark GreyFeatures Pressure Relief: With the rear cut out the cushion keeps your tailbone off the seating surface and at an elevated position. This removes the pressure from your coccyx and the spinal column whilst offering the right amount of support that you have been looking for. Lasting Comfort: The ergonomically designed memory foam relieves the main pressure points from your thighs and bottom part and distributes your bodyweight evenly across the seating