I bought this to help protect the rear bumper from my partner, she loved to drag the pram over my last cars bumber, chipping paint off left right and center.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=300468634540&viewitem=&sspagename=STRK%3AMEWNX%3AITIn the ebay listing pics it looks rather light and soft to me, it isn't, it is a thick solid hard rubber, and pretty weighty.. The entire back of it is covered in 3m adhesive and it sticks down well, hopefully it stays that way..
Some pics after I put it on..
As you can see in the pics I also have the Hyundai bumper protector, it works too but if you pack stuff on top of it it becomes kind of useless..