The Britax Isofix top tether kit is required for some cars to enable the Britax Duo Plus Isofix car seat to be fitted securely - namely Ford, Jaguar, Land Rover, Mazda and Mitsubishi models. The Top Tether kit makes the Duo Isofix seat universally compatible with any ISOFIX vehicle that features "top tether" anchorage points.To check if your vehical requires the Top Tether kit visit Britax Fit Finder Service.
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