Polycarbonate floor protectors provide a high impact resistant, easy glide rolling surface and will not curl, cup or flex on standard pile carpets Excellent clear protection around desk and computer workstation carpet and rug surfaces from chair caster or wheel based chair damage. Easy to clean, no chemicals needed for best results Incredibly durable and hard wearing for long-life protection. Polycarbonate will instantly flatten and stays flat in use, unlike some other plastic such as vinyl