Soft, thick, high-density rubber foam, Razer Pro Glide XXL Textured Micro-Weave Cloth Surface XXL: THICK, HIGH-DENSITY RUBBER & FOAMA At 3mm thick, the mats offer a stable base for your mouse and hand cushioning while working, and they are durable enough to endure extended use. Surface of Textured Micro-Weave Clothing Because of the mat's smooth surface, quick, easy