Is this able to last from birth right till my child is able to sit in a seat without any car seat/booster etc

Hi Anne, thank you for your enquiry, the 3R is suitable from birth until 45kg or 144cm, to move from a booster is it recommended that a child is 147cm, so you can change this for the 3 cm period, however, we would recommend talking to your nearest store for options with this. ?For further information on this or any of our other products available, if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.