Designed to reduce muscle tension and relieve strain on your back while wearing your baby, the Lumbar Support helps you maintain a natural lumbar curve while it cradles and supports your lower back. Made from contoured foam with side support wings provides medium to firm support to help you can carry your baby for longer periods of time. It is positioned on the baby carrier waist belt to keep it in place. Parents call it “priceless”, “the best thing since sliced bread”, and many feel it is an essential upgrade to their baby carrier. 8 by 8.2 inch (20 x 20.5 cm).