Cleartex Ultimat Chair Mat, Clear Polycarbonate, For Low/Medium Pile Carpets up to 1/2", Rectangular with Lip, 48" x 53" (FR1113423LR) Rectangular chair mat, with lip for use under desk - Protects your carpet from damage caused by moving chair casters. Made from polycarbonate - an incredibly tough and firm material which will not crack, curl, discolor or smell. 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. Chair wheels will not sink into this polycarbonate mat under normal use. Environmentally safe. 100% recyclable. Free from PVC. Child and pet safe. Greenguard certified. Gripper back for stability on low to medium pile carpets. Rectangular with lip. Size: 48" x 53" (Lip: 25" x 10"); mat size may vary slightly due to manufacturing process