Extra-large, polycarbonate chairmat provides durable floor protection for all pile carpet with twice the impact strength of PVC. Rectangular design offers high clarity and is impact-resistant, making it virtually unbreakable. Extremely durable polycarbonate won't curl, crack, dimple or discolor in normal use and is fire-resistant, odorless and environmentally safe. Material is also completely free of phthalates and other toxic chemicals.