Protect your special rugs, carpet & 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 & scuff-resistant. Vinyl, classic mat is almost 1/3" thick to help prevent sinking & offers maximum transparency & durability so it's perfect for big & tall users & heavy executive chairs. Free & Clear formula produces an exceptionally clear mat that is nonphthalate, noncadmium, BPA-free & lead-free.