Inateck Online via Amazon offers the Inateck 13.3" Envelope Sleeve for MacBook Air / Pro in Grey for $14.99. Coupon code "JARIXKW7" cuts it to $9.99. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.28.) That's tied with our mention from two weeks ago, $27 off list, and the lowest price we could find. Designed specifically for MacBook Air and Pro, it also fits most 11" laptops and features two back pockets and a small felt bag that can store your power adapter or mouse.