Tethering & height/weight limit

Hi Kate, Thank you for your enquiry, this seat is only suitable for use till approx 8 years of age and does need to be tethered. We do however have a number of seats available that can be used after 8 years of age, I have added a link to these below:  https://www.babyonthemove.co.nz/car-seat/shop-by-weight/15-54kg/diono-monterey
https://www.babyonthemove.co.nz/car-seat/shop-by-standard/ece-standard/RecaroMilanoBlack
https://www.babyonthemove.co.nz/car-seat/shop-by-weight/15-54kg/britax-parkway-sgl-booster
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.