Protect your special rugs, carpet and flooring from damage caused by chair wheels. Ideal for plush, high-pile or heavily padded carpets more than 3/4" thick. Blunt end studs won't pierce or damage your carpet backing. Beveled edge allows smooth on/off chair movement. Textured top surface is slip-resistant and scuff-resistant. Vinyl, classic mat is almost 1/3" thick to help prevent sinking and offers maximum transparency and durability so it's perfect for big and tall users and heavy executive chairs. Free and Clear formula produces an exceptionally clear mat that is nonphthalate, noncadmium, BPA-free and lead-free.