Can I use this with my Diono Rainier?

Hi Kat, Thank you for your enquiry. The Diono Angle Adjuster has a dense foam construction which adds firm, lateral support for increased stability. The Angle Adjuster fits all Diono Convertible car seats and is isofix compatible.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.