For low to medium pile carpets. Gripper back holds mat in place. 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.