America’s drivers are conscious about buckling up their safety belts. Adjusting their headrests in the best position to protect their heads isn’t as well known, a new survey shows.

Insurance company Progressive said a recent survey of 22,600 American drivers found that only 14 percent of them knew the best way to position the headrest on the seat of their car. Another 18 percent said they thought it was already configured when they bought the car. Forty percent said they don’t adjust the restraint at all before getting into a car.

“Fixing the position of your head restraint can help reduce your chances of a neck injury in a rear-impact crash, but the survey tells us that few people are doing it,” said John Bindseil of Progressive.