Low Resilience Chest Pillow Width 43cm x Depth 53cm x Height 3-10cm White Massage Pillow, Low Resilience Pillow, Prone Pillow, Chiropractic Pillow, Esthetic Pillow, Sleeping Pillow, Cushion, Prone Position, Face-down Pillow, Pillow, Massage, Chiropractic I purchased this for home care when I was going to a chiropractic clinic. The chest area is indented, making it less difficult to breathe and allowing for comfortable treatment. The 5th image is the instruction manual from when I purchased it on Amazon. I am selling it because I haven't used it much. Thank you for looking.