The Mophie juice pack air comes in 3 different colors. It is not only lightweight, but also protects your phone. The best part is that it is made to keep your battery charged at all times. With a switch systems, your battery gets recharged anytime, and at 100%. We all know how much we use our phones in a day and how often we are left not being able to access it because the battery is dead. This is a great, and very practical invention.