Probably a Dumb Quesion About Hard Shells and Such ...

why use one?

i'm being dense, – macbook pro comes built-in aluminum case. point of putting polycarbonate shell, or invisible shield, or whatever, on macbook pro? what's purpose of encasing aluminum case plastic case?

thank enlightening explanations.

 

less destructive damage , more cosmetic. is. aluminum can scratched , dings , people don't want plastic case decrease impact of small fall , save machine.
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