Thermally sealed foil creates a low tack backing that doesn't stick to the floor yet prevents the mat from sliding. Doesn't leave marks on the floor. Suitable for all hard floors including laminates, parquet, tiles and stone. Provides the ultimate in quality, clarity and durability for home and office flooring. Crystal clear polycarbonate allows the beauty of the floor to shine through and is the perfect gliding surface for chairs with casters. Polycarbonate is extremely durable and does not curl, crack, discolor or emit any odors or gases when used under recommended applications. 100% recyclable.