I have these on every pair of sneakers I own. I am not particularly athletic and so my "running" shoes are more of errand running shoes. I love the convenience of just slipping on my sneakers and heading out the door. I used to do the same things with my normal shoe laces, but over time they would stretch and look funny. These look great and function well. I like that it comes with more sizes than necessary (for all the shoes I have) so I can customize the fit of my shoe. I don't know how well they would hold up if you were using them on shoes you use for fitness/running.