Cleartex Ultimat XXL Polycarbonate Square General Office Mat for Carpets, 60 x 60, ClearCleartex Ultimat polycarbonate chair mats are the ultimate in quality and durability in floor protection and ergonomics. These high clarity chairmats for carpeted flooring are made from Floortex Original polycarbonate, which has double the impact strength of PVC and will not crack, curl, discolor or smell. The perfectly flat and hard surface provides easy glide movement of caster based chairs which can reduce leg fatigue and lower back strain. Ultimat