Much like Frē, Atlas is a two-piece case, comprised of a front and back that snap together around the iPhone 5. It’s about twice as heavy—62 grams, compared to 30—but the weight is still so light that it’s almost imperceptible, and the material feels sturdier, too. Your iPhone first gets inserted into the front piece, which includes a small holder at the bottom that comes about half an inch up the back. The device fits snugly…