Custom Vented Chair Mats Fromthick Translucent Vinyl, Rectangle With Beveled Edges, 36" W X 48" L Heavy duty 36" x 48" chair mat designed to reduce the occurrence of moisture and mold High performance chair mat with hundreds of tiny holes and beveled edges and rounded corners Protects all carpets; essential for carpets no more than 3/4"- inch thick including pad Exclusive anchor bar cleats hold firmly in place yet are gentle on carpet and fingers Greenguard indoor air quality certified