From me at this point only a recommendation: HANDS OFF OF THIS ARTICLE!
Not advise
PS: for the MacBook Air (13.3 ') this envelope is too large (about 1 cm on each side). This "flying" around the Macbook in this envelope.
UPDATE:
The rumor did not go away, so did the part sold on eBay. Property me now a decent Sleeve be.ez ordered here at Amazon and am fully satisfied.