Heavy duty polycarbonate chair mats for users up to 500 lbs. The perfect solution for use with Big & Tall & 24 hour office chairs.High gauge Original Floortex Polycarbonate with beveled edge.Exceptionally durablevirtually unbreakable in normal use.Polycarbonate will not crack, curl, cup, discolor or smell in normal use.Twice the impact strength of vinyl for an easy glide ergonomic surface.Will not adversely affect varnished or lacquered wooden floors.100% recyclable and produced using 25% renewable energy.For use on hard floors or all pile carpets.