Floortex Ultimat Polycarbonate provides the ultimate in quality, clarity and durability. Provides ergonomic benefits for chair user by providing easy glide movement and reduced leg fatigue. No cracking, No curling, No dimpling, No yellowing, No smelling. Environmentally safe ‚Äì PVC free and free of toxic chemicals. Polycarbonate mats can be used immediately, unlike PVC there is no need to wait for the product to lie flat.