The DropTech MacBook Air case is the first to provide always-on drop protection and is capable of taking a 6' fall without breaking a sweat. The DropTech's unique design strategically employs a combination of rugged and high impact materials that have no problem protecting the edges and corners of the Apple MacBook Air from normal use and repeated abuse.Zippered sleeves can get left behind. Clip-on shells pop-off off at the first hint of trouble and dont always offer adequate protection. The new MacBook Air case, on the other hand, is always on. Simply open the laptop, and shut it when you're done. Simple and effective, and super protective.