Just a huge rug! I didn't think there were such things until Steel Series came across to me. According to the sports material, the mouse flies like a racing car)) And the sensation has noticeably improved. But the main feature is, of course, a customizable backlight. It can react to notifications in the messenger or to game events, for example, it glows green when the character's health is normal, and lights up red when he is injured. A very cool accessory.