TwinGo Panel Extender allows the TwinGo Carrier to grow with your child! The innovative piece extends the height of the carrier to provide additional head & neck support for small babies or provide additional back support for large toddlers.;When to use: The Panel Extender can be used during two developmental phases: The newborn stage* and the toddler stage. For newborns, only use the Panel Extender in combination with the TwinGo Infant Insert starting at 7 lbs (3.2 kg) and up to the developmental stage when your baby has strong and consistent head/neck control.;How to use: Snap the Panel Extender directly to the TwinGo Carrier and wrap the the wings around the shoulder straps.;The minimalistic sleek design does not affect adequate airflow in the carrier so your baby will not overheat. There is no added bulk so this design allows your hands to be in direct contact with your baby at all times during the loading and unloading process.;Color: Black outside panel and blue inside panel to match TwinGo Base Carrier.