ULTIMATE NON-SLIP BASE - High density PU material grips the desktop to provide extraordinary stability. EXTRA CUSHIONING - 3mm thick soft base for comfort and the right amount of rebound return. Optimized wetting surface: hybrid fabric surface ensures smooth movement and provides adequate friction for accurate feedback. Nano protective coating: water repellent, oil and dust surface is easy to clean and maintain. Table size for wider sweeps: Extended size of 900 x 400 mm for more manoeuvring space.