Rectangular chair mat with lip for use under desks - Protects hard floors from damage caused by moving chair casters. 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 The transparency of this mat allows your flooring to show through - it won't look intrusive in your home or office. Lies perfectly flat straight away and has an easy glide surface to help reduce leg fatigue. Environmentally safe. 100% recyclable. Free from PVC. Child and pet safe. Greenguard certified. Smooth back for stability hard floors and carpet tiles. Rectangular with lip. Size: 48" x 53" (Lip: 25" x 10"); mat size may vary slightly due to manufacturing process