Because I have for a sleeve for my new 13 "MacBook Air (model August 2011) sought, I found after a while on the be.ez LArobe Black & White AIR. Due to the consistently good to very good reviews I ordered the bag. The fit is really great, but could still be a small lane close - but do not misunderstand, though there jerky nothing.
The material of the sleeve is very awesome - soft yet tough enough to protect the Air. About the design can certainly argue, but actually I did not have any better-looking case for a 13 "Air seen.