hello is it compitable with the maxway.. what are the measurements of the box area??

Hi Amanda, thank you for inquiry, the Britax Car Seat Protector can be used with all Britax car seats however, please refer to your car seat manual or contact the manufacturer to ensure warranty while using this product 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.?