This soft to the touch solar charger masquerades as a little book. It is meant to live with you in a subtle manner. Instead of having the overt outdoor aesthetic of many solar chargers, we chose an aesthetic that fits your everyday life a bit better. Though it may look pretty, it is no slouch on durability. We purposefully chose the silicone exterior to aid in shock protection. We then used the properties of this material to add cool features like the battery indicator and the soft hinge for folding the solar cells. When exposed to sunlight, a smart little light tells you that you are indeed charging. With some solar products it is tough to tell if you've got enough direct sunlight to charge efficiently so we've taken the guesswork out.