The product consists of 1 (one) pillow inner filling. Only the Piping Model is Suitable for Back Pillows. Thickness is 9-11cm. It Does Not Fade, Collapse or Cluster. It is antibacterial. Does not cause odor. It is suitable for erasing and does not cause fading or discoloration. The cushion filling is sent vacuum-packed and will regain its original form within 24 hours.