Right off the bat, we were impressed with the construction of Duo. Composed of a hard polycarbonate plastic, it has a soft touch rubber finish, similar to Speck’s SeeThru Satin. It feels quite sturdy without a lot of give. There are grooves on the inside edges of the case matching the steel frame of the iPhone 4, so sliding the device inside the case is quite easy. The bottom compartment is held in place with depressable tabs on Duo’s…
