I've tried many different solutions for holding my phone when I run: belts, arm bands, arm sleeves, and pouches. This is one of the better products I've tried: it's not bulky, holds my phone with case, makes it easy to access my phone while I'm running and, for the most part, doesn't bounce. It does tend to ride up on my waist, but even then it's not bothersome and doesn't really bounce much. I've gone on longish runs and could see myself running a marathon with this and not getting annoyed.AnotSee full review