SteelSeries QcK mass Limited Edition (Sudden Attack) is a super thick mouse pad made of a high quality cloth material with a specially designed non-slip rubber base which prevents the pad from sliding; no matter what surface the mouse pad is placed on. 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.