Innovative, SuperGrip Chairmat features a smooth bottom surface that replaces sharp shards and sticky adhesives to hold the mat firmly in place on carpet up to 3/8" thick and hard floors. Chairmat gently protects multiple flooring types from normal wear and tear along with damage caused by chair casters. Easy-glide, vinyl rolling surface improves mobility and helps reduce leg and back pain. Free and Clear formula is made without ortho-phthalates and cadmium to promote a healthy work environment while offering exceptional clarity and durability. Chairmat is Greenguard Gold certified for low chemical emissions.