StayPut PER®formance Plate Protectors are a pack of 12 large circular discs designed to sit between stacked plates, bowls or dishes, reducing scratches and chips, particularly on delicate glass or porcelain, not to mention the special dinner service. The fabric is a lightweight, food grade, mesh made of natural starch, which will allow air to circulate between stacked china, preventing any moisture build up or musty smells. Non adhesive, non slip even when wet! Toxin free and non allergenic. Fire Retardant and UV stable. Biodegradable. Safe on all surfaces, including Polyurethane paint or varnish. Hygienic and easy to clean. Machine Washable 40 degrees.