Do skins come off your phone????

I have the sprint Rumor and i am buying a skin for it from skinit.co on there site i cant find if it comes off or not can someone please help me figure it out please
Here is the phone
http://nextelonline.nextel.com/assets/images/phones/manufacturers/lg/lg_260_kit/lg_260_kit_thumbnails/white/LG260WKIT_LPI.gif

Here is the skin
http://sprint.skinit.com/devices/