Great product. There are open slots on the bottom so you can access the headphone jack, charging port and speaker/microphone when the phone is on the armband. You can easily control the touchscreen using the plastic screen on the front of the case. I use it with my iPhone 6 which has a very slim, flat body design and fits perfectly. It's very stretchy so I think a slightly larger case would work as well (not sure about something like Otterbox as I don't use a case that big). The strap is thinner than other straps I've had. used and it is very convenient. I have small arms and I adjust them about an inch so they aren't as tight as possible. My FAVORITE feature of the armband is the little velcro you can use to wrap the headphone cord so it doesn't get tangled or in the way while running. I typically use this for long-distance runs, so headphones are essential for both music and running app reviews. I hate having the headphone cords dangling all over the place and ripping out of my ears, so wrapping the cord tightly is a great solution. You can just slack the perfect length of cord to reach your ear.
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