In the race to be the thinnest battery case in the game for the Apple iPhone 6/6s, the Air Case may take the cake. An ultra thin option for those looking to add an extra shot of energy to their go-to smartphone, the Air Case shows off its slim and elegant appearance from every angle. To be exact, the Air Case only adds 3.8mm of thickness to the phone via an aluminum bumper with smooth edges in three optional colors. The pack comes with a 2400mAh backup battery to double the life of your phone, features pass-through charging that refuels both batteries at the same time, and has a built-in LED battery level indicator. The Air Case is available for pre-order now via Indiegogo with delivery later this summer.