The baby Bjorn One is the adjustable, wider based Bjorn buckle carrier.
The Baby Bjorn One allows you to carry babies from 8lb, but grows to carry older children on the front, back or facing away from the adult. Minimum age for outward facing is 5 months (for short periods, when awake) the maximum weight for outward facing is 12kg.
You can see the instruction manual by clicking here (opens in new window). Please familiarise yourself with all usage and safety information before using your hired carrier.