Exactly what I wanted for trail runs. I even find myself using it while running errands.Fits my iPhone X + Otterbox with a little shoving. And that’s in addition to a wallet, lots of keys, and water bottle. Works as a fanny pack or a tiny sling.I expected the water bottle would smack me while running, but it hasn’t been an issue. Still need to try a metal bottle, though. Unfortunately the 32oz I have doesn’t fit.I love the water bottle holder just wish the inside of the pack was bigger. I have a hard time holding my wallet, keys, shades in the pouch specially when you put the phone in the front slotI have tried several waist packs for walking my dog but this is by far the best. It fits my iPhone, doggie bags, water bottle, tennis ball, and small chuck-it. It has some additional room for small things like keys. I place the chuck-it along the side of the water bottle. You have to use a plastic water bottle to make this fit but I will start looking for a reusable bottle that is small. I cinch up the belt tight so it fits in the small of my back and does not move. I can put my shirt over it and it “hides” fairly well. Best of all it does not look like Grandma’s waist pack that she wears to the grocery store.Very compact and allows me to bring the things I need on a hike without being cumbersome.I was looking at this waist pack at UO and it's about the same price. it allows me to put everything Ɪ need for an outdoor walk in the bag plus a water bottle. You wanna make sure the bottle is not too heavy otherwise it's a bit of burden. Overall this is a perfect bag for outdoors!