The Viper Sleeve for MacBook Air from booq is a semi-rigid, ultra-thin case with a difference. There are no zippers in the Viper, so you don’t have to worry about scratching the aluminum chassis of the Air. Simply slide the thin side in first, and the magnetic closure will keep the case securely closed. The exterior is made of jute, a 100% natural fiber; the interior is nylon. The Viper is available in black, purple, sand, or gray. It’s sized to fit either the 11″ Air ($39.95) or the 13″ Air ($49.95).