The TRIM is composed of two different materials: the frame is a colored semi-soft plastic with enough give to slip the iPhone 4 in and out easily, while the back is a stiff frosted polycarbonate. Along the edge of the frame are three ridges, a distinctive design feature that provides shock protection and superior grip. A very small lip surrounds the front glass screen. Both the Sleep/Wake button and volume buttons are fully covered but click perfectly…
