Made of rubber, its cool to have a retro cassette player casing. But for guys who like to keep their phones in the pocket all the time, this aint for you. The rubber gives resistance everytime you take the phone out of your pocket., Its natural. But, there were no holes in the casing to allow charging of phone. You have to take the phone out of the casing to charge it. But its so cheap its just for fashion and fun!