While there is no magic number to give for how long a sports shoe bag should last a lot of it comes down to the quality of the bag and how well you take care of it. A well-made bag from a brand known for quality products will last longer than a cheaply made bag almost every single time! Also, if you take care of your bag, clean it often, don’t cram too much into it, and use it the way it was intended to be used, it should last you a good long while. You will also need to factor in wear and tear because obviously if you use your bag 5 days a week it will wear out faster than if you only use it once or twice a week. But as a general rule, a quality shoe bag that is taken care of properly should last you several years.