Bulky Costumes Don’t Belong in the Seat! Posted on October 27, 2015April 20, 2018 by SuperCarSeatGeek Boo! Sure your kids costumes are adorable but bulky padding or frilly dresses can add a surprising amount of dangerous slack into the harness in the event of a crash. Keep your little superhero (or princess) safe this Halloween by removing their costumes prior to hopping in the car! Happy Haunting!