The 13 inch PalmGuard Air from Moshi protects the palm-rests on your MacBook Air 11" from dust, grease, stains and scratches. The semi-rigid film is form-fitted to the MacBook Air, providing a nearly flush appearance. A separate trackpad film protector also prevents damage to your trackpad. The one-time attachment of the PalmGuard is easy and when you remove it, it doesn't leave any sticky residue behind. Keep your MacBook Air in perfect condition using the PalmGuard.