It is not actually illegal to drive in flip flops, or bare feet, but the RAC says studies have shown the sandals can increase braking time and make accidents more likely. Motorists are technically allowed to get behind the wheel wearing flip flops - if they are able to safely operate the controls.
Because flip-flops don't have that arch support, you just step flat, hitting the ball of your foot hard, says Dr. Ramsey-Parker. “When you hit something long enough walking, it becomes irritated,” she says. ... The flip-flops can break or slide off your foot, get stuck under the gas pedal, and make it impossible to stop.
The thong part of the flip-flop should fit comfortably, neither too loose nor too snug. Straps that are too tight could rub and cause blisters. Too-loose straps may result in you losing the shoe at a critical moment — resulting in injury.
A good distance for flip flops is around half an inch all the way around your feet. If your flip flops have fabric, leather or cloth straps then you'll want to make sure that they don't rub the top of your feet. ... For these types of flip flops, make sure it's a snug fit.
Buying Flip Flops. Check for 1⁄2 inch (1.