Lincoln NAUTILUS 2021 Supplemental Owner's Manual page 24

Child Safety
If the booster seat slides on the vehicle seat
upon which it is being used, placing a
rubberized mesh sold as shelf or carpet liner
under the booster seat may improve this
condition. Do not use any item thicker than
this under the booster seat. Check with the
booster seat manufacturer's instructions.
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2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing