It's important to notice the difference between SteelSeries QcK mass and all other mouse pads from our SteelSeries product line. This mouse pad features extremely heavy thickness which results in a very unique feeling. While the mouse pad is much more soft and comfortable to touch, the height is also fairly massive, reaching a total of 6mm. Other mouse pads from SteelSeries are very thin, aiming to provide a high quality gaming surface, as close as possible to level of the tabletop it's used on. This limited edition SteelSeries QcK mass features a graphic on the surface from Sudden Attack, a popular Asian online FPS game, which immerse the gamer in the battle between the United Great Forces and the rebels from Tanziriro Liberation Front.