Review (4/5): A bit tight, but a perfect fit.
This is one of the best running arm bands, because it fits the iPhone PERFECTLY. It also doesn't include a plastic cover that makes it hard to navigate or see your iPhone. This is a WIN for the iPhone 7, because the iPhone 7 is water and dust resistant to normal running standards. The case fits tight. That's also a huge problem. It's difficult to get your phone back out. I think this is the only negative. I don't mind having to take my iPhone out of it's case, but to have to work hard to get it out is not so great either.