First clear chairmat made from renewal plant sources that contains 26% USDA Certified Bio based content by weight. Phthalate FREE and Cadmium FREE. Protects loop/Berber style carpet up to 3/8" thick including padding. For moderate use in home and office applications. No Crack Mat Guarantee. Made in the USA. Straight Edge. Exclusive Anchor Bar® chair mat cleats hold firmly in place yet are gentle on carpet and fingers.