How Tight Should a Car Seat Be: One Inch Rule
The One-Inch Rule That Could Save Your Child’s Life A properly installed car seat should not move more than one inch side-to-side or front-to-back at the belt path. This is the golden rule backed by NHTSA, AAP, and Safe Kids Worldwide. Harness straps must lie flat and snug—no slack when pinched at the shoulder. This … Read more