I think I will need these if I want to avoid the worn wrist-rest area on my MBP.  The imitaion aluminum-colored plastic on my Dell wore through after a year. Sure, I shouldn’t be typing like that in the first place, but that’s life.

http://store.mygearstore.com/marware-marware-s–protection-pack-for-apple-macbook-pro-15–la-10091.html