The Infant Insert makes it possible to carry your small infant in your Tula Baby Carrier, and is required for use with a baby between 7-15 pounds. The insert enables the cozy carrying position, ensuring adequate head/neck support and healthy maturation of the spine in a front carry. The Infant Insert includes an integrated harness which secures your baby to the insert.The Infant Insert is recommended to securely and comfortably use our Baby sized Tula Baby Carrier with small infants, up to until your baby can sit independently with knees dangling down freely in an ergonomic spread squat position and is a minimum of 15 pounds.The Infant Insert is not intended to be used in a back carry or to be used with our Toddler sized Tula Baby Carrier.