Rigid top surface with low roll resistance for an easy-glide chair movement. Ecotex polypropylene mats are guaranteed not to crack, chip, cup or shatter under normal use and correct application. Compatible with under floor heating systems. Not sensitive to alkali-based cleaning products used at their manufacturer-recommended concentrations. Easy and effective recycling properties for end-of-life re-use. Odorless and toxin-free. BPA-, PVC-, tin-, lead- and cadmium-free.