How does SecureGuard work?
The SecureGuard clip slides over the lap belt portion of a lap-shoulder seat belt to keep the lap belt properly positioned low across the child's hips/upper thighs, preventing the child from submarining under the belt during a crash or the belt riding up into the child's abdomen.

Why does the seat need SecureGuard?
The purpose of a belt-positioning booster seat is to lift or position a child so that the vehicle seat belt fits across the strongest parts of the child's body. A study conducted by the Insurance Institute for Highway Safety states that "the lap belt should fit flat across a child's upper thighs, not across the soft abdomen, which is more likely to be injured in a crash than bony structures like the pelvis." In the event of a collision, a lap belt that is improperly positioned across the child's abdomen can cause serious injuries, including injuries to internal organs, that can't always be diagnosed immediately and can be life-threatening. Even in cases where the lap belt is initially positioned correctly across the child's hips/upper thighs, it is possible that the forces associated with a collision may cause the child to slide downward under the belt, resulting in the same risk of abdominal injuries.

The SecureGuard clip ensures that the lap portion of a lap-shoulder vehicle seat belt is properly positioned across the child's hips/upper thighs, both during normal use and in the event of a collision.

How long has Britax incorporated SecureGuard in their seats?
The SecureGuard feature was first introduced in the USA with the launch of the Parkway SG Belt-Positioning Booster Seat in July 2009.