Rather than an all-wood design, Grove chose to use a plastic-feeling plant fiber composite on the inside and bamboo on the outside; it’s really more of a wood-coated case. Both pieces of the slider have a soft microfiber pad on the inside to protect the iPhone’s aluminum and glass back. They easily slide on and off, although the halves of our review unit didn’t quite line up correctly; they were just a hair off. Unfortunately, there’s…