Dressing Young (Part 1)

Have any of you runners or walkers used a product like this? My workout leggings or skorts don’t usually have pockets and I need a place for my phone etc.

https://fusionbelts.com/?gclid=CjwKCAjwsO_4BRBBEiwAyagRTRaqU-OuqqKwbZNNIwmhDzs-S4bY2OnadWxPSIf9DJq9sGstLnSVSxoCgLYQAvD_BwE