I wear flip flops mostly, and keep sneakers in the passenger side next to me. I have 6 pairs of flip flops now. One thing I try to do since I travel so much is to do most of my driving at night especially in the heat. Since I'm usually carrying my dogs with me, they have to have AC. They are absolutely miserable without it. My big one will stick his face up to the grate and start heavy breathing. They are prone to quick over-heating/heat stroke so I have no choice with him. Oh, and I carry quite a bit of medical equipment with me. My friends always make the joke that I have enough stuff to perform open heart surgery in the back of my car. Well worth it too. I've witnessed my fair share of accidents (fatal) and some weird stuff that hopefully no one else here has had to witness.