The ultimate chair mat for the heavier user. Tested to 500 lbs. Ideal for use with Big & Tall and 24 hour chairs. Extremely durable polycarbonate will not crack, curl, cup, discolor or smell and is virtually unbreakable in normal use. Easy glide ergonomic surface. Clear construction allows the beauty of flooring to shine through. Free of PVC, phthalates and all toxic chemicals. 100% recyclable and produced using 25% renewable energy. Suitable for hard floors or all pile carpets.