Contour Twin 39 X 75 X 9 Excellent Retail Packaging! Protects Mattress Heavy 3 Gauge Plastic Individually Sealed In A Poly-bag Treated With Flame Retardant Fits Both Mattresses And Boxsprings Up To 9 Thick Notice To California Consumers: Warning: This Product Contains Chemicals Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm