The 600 has a leather feel and gets hot quickly. the sole of my crocs tend to wear off fast and then the crocs would slip on wet surfaces. i will be purchasing another one soon,and would definitely recommend this case to a friend. Wer sich also im Nachhinein über Druck auf den Ohren beschwert, ist selbst schuld, denn so ziemlich alle On-Ear-Kopfhörer drücken nach einer Weile. It is way too big on me. I had blisters/cuts for wearing them for just a few hours. There was about two fingers between her toe and the shoe. They are so comfortable and offer great support. Other cases are small, some have batteries for charging your phone, LED displays, and anti-slip coatings. Next, heres some helpful info from the included manual:Wireless range: 10 meters (honestly, I get better range than that.