Cleartex UnoMat, Anti-Slip Chair Mat, For Polished Hard Floors/Very Low Pile Carpets/Carpet Tiles, Rectangular, Size 35" x 47" (FC128920ERA) Clear polycarbonate floor protection mat with a low-tack anti-slip backing and a textured top finish for added stability in use. Made from polycarbonate - an incredibly tough and firm material which will not crack, curl, discolor or smell. Lies flat and stays flat. Chair wheels will not sink into this mat under normal use Protects hard floors against wear and damage caused by chair casters and shoes. Its anti-slip backing will not damage varnished or lacquered wooden floors. Provides ergonomic benefits for chair users, as the easy-glide top surface can reduce leg fatigue. The clear mat allows your flooring to show through, so won't look intrusive in your home or office. Anti-Slip backing suitable for use on polished hard floors, very low pile carpets and carpet Tiles. Use this mat with the smooth side face down on the floor for optimum results; mat size may vary slightly due to manufacturing process