They’re versatile, comfortable, and easy to slip on and off.Credit: Travel + LeisureAs much as I love traveling, long travel days can be rough for me, thanks to my ongoing issues with plantar fasciitis. This foot condition, which causes a stabbing pain in my left heel, is exacerbated by long periods of rest in between activities. By the time I arrive at my destination, I’m already taking Advil to ease the inflammation and pain in my feet.Unfortu…