I can not fault it

The ActionWrap I use with the iPhone 4S, which is surrounded by a thin sleeve.
Without any problems I can phone on and to press or squeeze without much unpack.
Once the phone is housed, it remains in position. The screen can also be easily operated.

The problem that the Velcro is not appropriate consistently, I can not confirm!
I have a continuous Velcro layer and had no problem, even with different circumferences not (with thicker and thinner clothing, or on the skin).

I think it is for approx 0.90 Dust caps for the headphone jack to buy, as they may spill may water into the unit when it rains but for recommended, or as a number of times by others perhaps addressed even sweat in the mobile phone could penetrate. I think that even though not necessarily possible (at least not for me), but that everyone must indeed decide for yourself.

Unconditional purchase recommendation.