For use with loop/berber style carpet up to 3/8" thick including the padding. Protect your carpet and stay on task with an ultra clear mat that allows you to roll freely within your workspace. Exclusive AnchorBarÂ® cleat system holds as securely as traditional cleats, yet is gentle on the carpet and fingers. Crystal Edge creates a smooth finished edge of superb clarity while providing effortless roll on and off mat. For moderate office applications. Protects against wear and tear from chair casters. Engineered for optimum clarity, high performance and a smooth effortless roll.