Grosfillex furniture is made of a resin composite carefully formulated to pass rigorous test standards. Polypropylene resin, a by-product of the oil refining process, gives the product its resistance to most common food stains, moisture, salt air and chlorine.  It will not trap nor harbor germs, fungi or bacteria. Calcium carbonate or talc gives the product its rigidity.  Pigments give the product its color.  Chemical additives provide resistance to static buildup, fading and heat. Grosfillex may also include polypropylene copolymer in the formulation of furniture where resilience and resistance to repeated use is needed.