Cleartex Ultimat Polycarbonate Chair Mat for Low/Medium Pile Carpet, 35" w x 47" l, ClearCleartex Ultimat polycarbonate chair mat is the ultimate in quality and durability in floor protection and ergonomics. This high clarity chairmat for carpeted flooring is 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 is