What is the Base booster weight limit?

Hi Kayla, thankyou for your enquiry, the weight limit for the Spectrum is the same at 49.8, with or without the backrest on. we do recommend for safety reasons to only use this with the backrest. We hope this helps. ?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.