Razer Gigantus v2 Classic Black Cloth Gaming Mouse Pad XXL: Reliable Mouse Movement High-Density, Thick Rubber Foam The mats, which are 3 mm thick for M&L and 4 mm thick for XXL&3XL, stay consistently flat even on uneven surfaces. Swift Swipes of Fluid Surface of Micro-Weaved Cloth All mouse sensors have been optimized for pixel-by-pixel accuracy and complete tracking response.