Checkered chairmat offers a contemporary style to desk space. SuperMat thickness is recommended for medium-pile to low-pile carpets with up to 3/4" thickness. Checkered design grips carpet to hold the mat in place and does not include studs so it won't pierce or damage carpet backing. Chairmat features a textured top surface and beveled edge for smooth chair movement. Free and Clear formula produces an exceptionally clear mat that is nonphthalate, noncadmium, BPA-free and lead-free..