One of the reasons why we love Timbuk2 is the ability to customize many of their bags and sleeves, and the Custom Envelope Sleeve is no exception. This sleeve, which will snugly fit your Microsoft Surface, features a high-density foam that absorbs impact if you should drop your device or bump it up against a hard surface. Plus, its scratch-resistant liner ensures that your Surface won't get any bumps or bruises. And it's TSA-approved. The case has three panels, and you can choose out of 50 colors and fabrics for each panel. $39