The SuperMat chair mat is a versatile choice for frequent use on carpets up to 1\/2" thick and is well-suited for a variety of commercial and home office applications. Easy-glide rolling surface provides smooth chair movement to help minimize stress and strain on users back, legs and feet. Bottom studs grip the carpet securely and keeps the chair mat from moving. Deflecto's Free and Clear non-orthophthalate, non-cadmium formula promotes a healthy work environment.