Review on Convenient Mobile Phone MP3 Wallet Holder: Arm Package for iPhone 6/6S Plus - Perfect for Sports, Running, Hiking and Exercise! (Green, 5-Inch) by Richard Jarvis

I use this as a hand carry for my slim wallet with money clip and phone. I use a zipper to hang my keys (there is a hole in the zipper that fits most key rings). It's very comfortable and seems sturdy enough. I shook my whole body violently for a minute and it stayed in place. However, it doesn't fit my biceps. And waiting is uncomfortable on the forearm. And my arms aren't HUGE, but I can barely get velcro on my biceps. But she's a little tight. Circulation is still good but I chose to wear it on the ankle and it fits perfectly and stays in place.