ONGUARD LLC ONG-IP4S-2 Dry-Apply Premium Anti-Scratch Protector for Apple iPhone 4S - 2 Pack  -  Retail Packaging - Black/White we use the same material as F1/Nascar racing cars protection, which is 3 layers thick.  Its totally custom-cut by model, doesn't change looks or add bulk to the device, eliminates smudges and fingerprints while enhancing grip Does not change looks or add bulk to the device Eliminates smudges and fingerprints while enhancing grip