I use the sleeve now for quite a time and have to say I am totally satisfied. . I use the sleeve for my MacBook Air 13 "This is indeed transported in a backpack, was there previously but always exposed to various crumbs The problem I have is no longer through the shell MacBook always looks like just cleaned out;...) When Open the protective cover must have no concern that the MacBook could fall out, because it is held by the zipper protection in your pocket. This protection is initially unfamiliar, but is very quickly becoming a valued extra. I personally use also the cloth that doing is prevents imprints the keyboard to the screen. The cloth can also be used for (dry) cleaning of MacBooks.
I highly recommend this case. They also fit for the MacBook Air 13 ". It looks chic and is very well thought out. For me 5 stars.