SF Bags DashSleeve Case - $89.99
If you already have a backpack that you love, you need a great sleeve to stick your Surface Pro into. Consider buying one of SF Bags’ DashSleeve Cases for your Windows 2-in-1.
The Surface Pro DashSleeve cases come in horizontal and vertical versions so that you get the sleeve design you like the most. Your Surface Pro slides into the foam and textured pocket for protection, and a band keeps it from ever working itself out and falling to the floor. The vertical version of this back has a slot for storing your Surface Pen when you aren't using it.
SF Bags sells the 2017 Surface Pro DashSleeve Case for $89.99. You choose from black, nylon, blue, green, grey or red.