Unique Function Air guide groove: No longer need to worry about the bubble, even if the temperature is very high. Memory repair function: If the vinyl wrinkles up, a hair dryer and a board is enough to smooth it. What's the difference between 3D, 4D, and 5D? 3D: It has stereo strips on its surface, give people a visual 3D feeling. However, the 3D strips couldn't perfectly work under dark and strong light environment, and also easy to absorb dust and be broken. 4D: It changes the 3D strips inside the surface, which is a higher technology. This technology solves the dark light problem and makes the strips more stereo under street lamp. However, when you are observing it and move from place to place to change the angle the observation, the strips couldn't perfectly adjust its light reflection and show a little unnatural comparing to a real stereo strips. 5D: It makes a bigger advance at dealing with the light reflection. It uses a double layer mixed technology, which makes its strips slimmer and more beautiful than 4D, and could change along with the light more sensitive. It also has a plastic film on the surface, making the reflection better. Its color is closer to the real carbon fiber than 4D.