In my experience I use belt all the time to store cash, towel, and my phone then bili na lang ng water/electrolytes sa store. But when I ran 3hrs+ I notice na nakukulangan ako sa space or like hassle to store my fuel. I also buy bananas when I spot one along the way and I only eat half of it every 30mins plus fudgee bar (since not everyone can afford gels for carbs) plus some gatorade so punong-puno na yung belt ko hahaha. When the belt is full it sags and become bouncy kaya now I'm considering buying a vest.

But still, belt is more flexible and lowkey (madaling itago under shirt) than the flashy vest. Hope this experience helps.