Extend the life of your medium pile carpet (up to 3/4" thick including padding depth) by protecting against chair caster wear and tear. The perfect addition to your workspace, this chair mat provides a smooth surface that enhances ergonomic comfort by allowing your rolling office chair to move freely. Distinct, large shape to compliment your work area. This chair mat is made with durable vinyl that is GREENGUARD Gold Certified for low chemical emissions to promote a healthier workspace. Designed for use on carpeted surfaces only, do not use on hard floors.