In 2019, the world record may have been set for the number of travelers that chose a plane as their means of transportation. Since January, more than 4.6 billion passengers have used planes. Of course, for many people, the airport and the plane are almost like their second home. These people know a lot of secrets that may help improve comfort and safety during the flight. As it turns out, sometimes, even the seemingly unimportant details matter, like clothing and shoes.