We have spent eight years designing the Impact harness. We don't want to brag, but the Romans only took seven years to build the Colosseum. That's eight years of experimenting, failing, learning, planning, developing, and testing car seats in crash tests. All of this has gone into the development of the Impact harness. The harness is made from a single webbing strap with reinforcing bar tacks. The result? A true monument to safety and comfort, built according to the Federal Motor Vehicle Safety Standards for child restraint systems. It is our greatest achievement.