The holder of a bestelt neoprene-type material that clings pleasant. There are no sharp corners still open seams.
The Velcro closing all very safe, so nothing can fall out. That there are two loops, this band fits around each arm.
The iPhone can continue to operate without problems. As a little extra, there is a key subject in which you can store one or two keys. Through reflective material on the outside of you in the dark a little safety, since it is easier to see.
Perfect for those who make the sport like listening to music or to read from and messages.