Mattel & Fisher-Price
Customer Service
Safe Embrace™ Convertible Car Seat

Before placing your child in the car seat, check the proper function of the harness adjuster strap (the single strap located at the foot of the car seat.) To do this, pull on the harness adjuster strap to tighten the shoulder belts. Then, with both hands, firmly pull the shoulder belts toward you. Watch the harness adjustment strap. It should NOT slide or retract into the seat as you pull the shoulder belts; it should lock in place.

My harness adjustment strap is secure as I pull.
My harness adjustment strap retracts as I pull.