Chariot Baby SupporterPadded sides and head support to ensure your baby sits comfortably upright. (Age 6 18 Months). Support for small children A padded supporting structure for younger children who require extra support. It offers support for the child's waist and head, and the headrest is designed to ensure a comfortable fit, whether they're wearing a helmet or not. This product is compatible with all Thule Chariot bike trailers. Grows with your kid Adjustable head