Semi-hard case reinforced Nothing to say: Quality Case Logic! Is perfectly suited to the Mac Air BOOK 13 "for létui closes properly, however it is best to put the thickest part of the laptop at the bottom of the case. Velcro closure very strong (a bit noisy at the opening!). Given the size of the inner case, do not try to slip something other than your mobile phone (except for a USB stick). This cover is also given by the manufacturer for laptops from 13 to 14.1 ": certainly for new laptops 13" ultra-thin, for the old and the 14 "I have some doubts (see previous comment) but I n 'have not tried.