The ergobaby OMNI 360 carrier has four carrying positions. The carrier is suitable from newborn (7lb) without the requirement to use an infant insert. The upper weight limit is 33lb and suggested age range up to 36 months.
The carrier can be used on the front, back and hip, and also in the facing away from you position (minimum age 5 months).
Here is the instruction manual. Please read this before you use your rental carrier and follow all guidelines for use.
https://ergobaby.co.uk/instructions#Omni360