When it comes to casual summer sandals, flip-flops are the go-to choice for many people. After all, they’re easy to slip on and off, perfect beach shoes and come in many styles and vibes. The only catch? They don’t always have the best support, says Dr. Gregory Alvarez, a podiatrist at the Ankle & Foot Centers of America.

Many flip-flop styles have completely flat soles, which can leave your feet hurting after wearing them for many hours. To make your flip-flops as comfortable as…