I've acquired a similar cable. Unfortunately, I had not thought of one detail: the size of the jack on phones and existing players. With my music player (iPod), it was impossible to connect both the cable and the connector for charging the iPod. With my phone + protection, it was impossible to drive the jack completely within gently twist protection.
The cable thus has a very interesting feature: the cover of his jack has a small diameter while, which solves all my problems above.
The cable itself is wrapped with a nylon braid. It gives him the stamp and especially it gives him a good elasticity to prevent the cable nodes.