The product consists of 1 (one) pillow inner filling. Only Box Model is Suitable for Back Pillow. Thickness is 10-12cm. It does not cause fading, collapse or accumulation. It is antibacterial. Does not cause odor. It is suitable for erasing. It does not cause fading or discoloration. The cushion filling is sent vacuum-packed and will regain its original form within 24 hours.