Flip-flops are a type of casual footwear characterized by a flat sole and a Y-shaped strap that passes between the first and second toes. They are popular for their ease of wear and comfort, making them a go-to choice for warm weather and beach outings. These sandals are often made from rubber or foam, providing lightweight and water-resistant qualities. While they are ideal for casual settings, it's important to note that wearing flip-flops for extended periods may not provide adequate support for the feet, leading to discomfort or injury in some cases.