No, UPPAbaby does not allow vehicle seat protectors with their car seats because they haven't been tested or approved for use. The car seat base has a finished bottom to prevent vehicle seat damage.

While not required by law, the Multi-Directional Tether is strongly recommended for use in both rear and forward-facing mode for optimal protection. It significantly reduces injury scores by as much as 45%.

(*2020 results from crash testing conducted at independent labs in U.S. and Canada)

In both rear-facing and forward-facing mode, the headrest should be positioned at the child’s shoulders to ensure proper fit of the harness. The headrest can lightly touch the shoulders and allow 1 in of space between the child’s shoulders and headrest.

The fit inlay must be used with children from 14 - 25 lbs in order to achieve a proper harness fit.

Koroyd’s welded tubes crumple instantly and consistently on impact, absorbing maximum force in a controlled manner, minimizing energy transferred to the child. This unique behavior helps to protect your child from impact forces which may reduce the risk of suffering a life-changing injury.

The Knox fit inlay provides an excellent fit for smaller children and must be used from 14 to approximately 25 pounds. It ensures proper positioning of the child relative to the harness and crotch buckle.

Check your vehicle owner’s manual for vehicle top tether anchor locations. They are often found in sedans behind the backseat headrest or in other vehicles behind the seat back.