Upp is intended for children aged 6 months and up. The maximum weight is 18 kg, so you can use it until your child is approximately 4 years old. If you want to use Upp from birth we recommend using a baby car seat until an age of approximately 12 months. Car seat adapters that are compatible with Besafe iZi Go, Cybex Aton, Maxi-Cosi and Mima iZi Go are available. An Upp carrycot will be added too.