Sometimes the obvious choice is the best choice, which is why we love the new manila envelope-based AirMail sleeve designed for the new MacBook Air by our favorite quick thinkers, Jona Bechtolt and Claire L. Evans. Yep, someone already did it. We were hoping that the Airs would ship in an actual manila envelope, but the AirMail lends functionality by handmaking the case out of upholstery grade vin