The TwinGo Panel Extender allows the TwinGo Carrier to grow with your child! The innovative accessory extends the height of the carrier to provide additional head and neck support for small babies or provide additional back support for large toddlers. Use the conveniently placed snaps at the top of the Panel Extender to attach the sleep hoods to your TwinGo Carrier. 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. Be unique: Customizing your twin baby carrier is fun!