Surface is made of silk-processed cloth to ensure that mouse moves very smoothly. Bottom is made of natural processed foam rubber, which gives flexibility to adapt to desktops of different surface materials, anti-slip, high-quality long-life design. Super-fine and high-density materials, waterproof and easy to clean. Reinforced stiched edges prevent deformation. Advanced multi-layer integrated process, high flexibility, anti-curling and sliding. Complimentary weights : 40g x 1, Works with M901/M902/M905/M801/M802/M601 Redragon P002 ARCHELON Gaming Mouse Pad Include 40g Weight (Extra Large-Size) All gaming mousepads aren¡¦t created equally. Redragon gaming mousepads are built and tested by gamers for gamers. Only the highest quality components are used to guarantee razor-sharp performance and precision. Everything from the top, bottom, and sides were engineered for maximum gaming accuracy and longevity. At just 5mm thick they are designed to be hard on top and soft on the bottom for high flexibility and anti-curling. Top Surface The high quality top surface is made from silk processed cloth¡Aensuring the mouse moves smoothly with optimal glide. An advanced multi-layer process is used to provide thousands of light reflecting microscopic points for ultra-precise tracking. This super fine and high density material is waterproof and easy to clean. Bottom Surface The bottom is made of natural processed rubber, this provides flexibility to adapt to different desktop surfaces. This natural rubber base also ensures a firm and steady grip of your desk for hardcore gaming sessions. Edges The edges are expertly reinforced by a dense stitching process that not only looks great but also prevents damage and deformation.