The TPU, which stands for Thermoplastic Polyurethane, gives the case a much more glossy, smooth and stylish look. While it is similar to Silicone, the TPU helps with better grip and prevent your Samsung Galaxy Light T399 from sliding all over your desk or on smooth surfaces. Because of the rubber and TPU silicone material, it fits your Samsung Galaxy Light T399 like a glove and you will have access to all the cut-outs to the headphone jack and charging port while keeping your side buttons covered and dust-free. While there are so many colors and designs to choose from, it can be a bit overwhelming. However, each case is designed with high quality material so it’s a win-win for you no matter which item you choose!