With light wear, a $5 pair of flip flops may last a year or more. With heavy use on tough terrain, a $50 pair may last 3-6 months. Generally, the longer they are worn, the faster they will degrade. Flip-flops are easy to clean. So if you get them dirty, just give them a good scrub under hot water and they'll be as good as new again. It is recommended that you wash your flip-flops at least once a week in a washing machine with cold water and detergent. If you don't wash them regularly, then they won't last as long. Flip-flops should not be placed in the dryer or put through a dishwasher because this will damage the foam cushioning inside the shoe and shorten its life. If you want your flip-flops to last longer, avoid walking on hard surfaces like concrete with outstretched feet. This will cause the flip-flop's heel cup to wear quickly. Heels are designed to stand up straight so that they can take weight off of the foot and leg while walking. This allows any sore spots on the foot bed or sole to heal naturally.