This is the perfect waist pack to run 4 miles or less. Been using it for about a month and no complaints. This waist pack carries my essentials, keys, phone and license. No need to carry a wallet when most retailers accept Apple/Google Pay.
For my longer runs such as 6 miles or more, I would need a run vest to carry hydration fluids and snacks. I know 10k and half marathon events have water stations, but I rather drink my water rather than their fire hydrant water.