Monoprice 110491 TPU Case for Samsung Galaxy S4 - Retail Packaging - Black This case is made of TPU (thermoplastic polyurethane) a material that combines the flexibility of silicone with durability and protection of PC (polycarbonate) The case has cutouts on the top and bottom for the connectors and on the back for the camera lens flash and speaker The buttons on the sides are covered with a thin section of TPU allowing each button to be manipulated without exposing it to the elements