When buying a car seat, parents want to get the very best item to protect their baby. Although parents obviously are putting forth the protection to keep their child safe, many are doing it incorrectly, as the National Highway Traffic Safety Administration discovered that almost 4 in every five cases of them misused the safety seats they placed their child in. By failing to properly use the safety restraints, the study reports, many parents unknowingly put their child in peril. Typically, the biggest mistakes were loose harness straps and safety belt attachments. The National Highway Traffic Safety Administration calls these misuses ‘critical’ because they can cause some of the greatest potential for injury.