@Furgar No man needs to care about some random woman's opinion of him, especially at the airport. I am not at the airport to impress people, I am there to travel on a plane.

One lesson I learned from traveling with a co-worker was to travel with maximum comfort in mind. I saw him wearing sweatpants, and it made mean realize that being comfortable for an hours long flight is more important than dressing for strangers so they don't "get the ick."

And who cares how you hydrate? Not me.