Review on Water-Resistant SPIbelt Running Belt Waist Pack for Runners - No-Bounce Fanny Pack for Smartphones iPhone 6 7 8 X - Men Women Adjustable One Size Expandable Performance Sport Running Pouch by James Holker

Overall great product. The elastic band is strong and placing with the bag causes very little bounce without having to pull it very tight. When you start running, the strap cushions the impact of your step and doesn't wobble. I carry my iPhone 11 Pro in it. It has enough space for other things if I need a key or a credit card/ID. I don't know why it is advertised as waterproof. When I sweat, it permeates me and everything in me. I usually run for about an hour and the temp is still around 70-80(F) so I sweat a lot. My guess is that this might be more sustainable if you get caught in a quick downpour or something and get to a dry spot quickly. I wouldn't advertise anyway. It looks like a stretch.