So, the iPhone is still an aluminum frame around, and that's why it needs already some Patz ...... in this case is sufficient Patz available.
One can attach (backpack, etc) on your belt or vertically running belt .... also it feels very valuable and looks great too.
Sohnemann it has always "on man" when he is in Parks .... Thus, the phone does not fly at the Achterbahnfarten through the area .... ;-)
So, absolute buy recommendation .... For further questions I am happy to help.