ely regarded to be comfortable, flip-flops do not provide ankle support, and can cause many foot-related problems. Some flip-flops have a spongy sole, so when the foot hits the ground, it rolls inward and the sponge allows it to roll even more than usual.[9] This is known as overpronation and causes many problems in the foot. Each time a foot hits the ground, the arch is supposed to be locked to absorb shock. But during overpronation, the arch opens and releases this locking mechanism, leading to problems such as pain in the heel, the arch, the toes and in the forefoot. Overpronation of the foot also results in flat feet, especially if flip flops are worn throughout childhood and adolescence when the muscles, bones, and tendons of the feet are growing and developing. Exacerbating this, some flip-flops force a person to overuse the tendons in the foot, which can cause tendinitis.Ankle sprains are also common due to stepping off a curb or stepping wrong; the ankle bends, but the flip fl