I gave this armband to my sister who is a lunchtime walker or runner..depending on what her dog wants to do. She used it for about a week and reports back that she really liked it. Her Iphone fit in it well. She was able to put her phone in with her case on. She has a clear plastic case. Was able to use the phone through the front plastic covering and the front. The holes in the armband phone holder matched up well with her phone. It was easy to plug in her headphones. Did not slip down her arm while running or walking the dog. The back and the band is made of a synthetic rubber material designed to be flexible, durable and resilient. The front of the phone holder and the closure is made of a soft pleather. I tried my Galaxy S6 active in it. It also fit and the slots on the top lined up for my earphones. The only con is the key holder is small and nobody really carries just one key around with them. It would probably be good to keep a spare key in there but not one that is one your key ring. Perfect for the runner, walker or hiker. I received this product for a discount. All my reviews are based on my own experience and evaluation of the product so that others can benefit in finding quality products that meet their needs.