Estee Bedding Company All Makes Mattresses Part Number Mattress Size PAC3278  32"X78"  PAC3675  36"X75"  PAC3680  36"X80"  PAC3880  38"X80"  PAC3980  39"X80"  PAC4280  42"X80"  OEM Mattresses PART INFORMATION Part Number Mattress Size Truck Compatibility PAC3278  32X78X6.75  Kenworth, Peterbilt, Freightliner and Navistar  PAC3675  36X75X6.75  Volvo  PAC3680  36X80X6.75  Freightliner and Navistar  PAC3880  38X80X6.75  Kenworth, Peterbilt and Freightliner  PAC4280  42X80X6.75  Kenworth and Freightliner  FEATURES * All mattresses are made with innersprings, with a gauge border wire to allow less sag on the edge of the mattress. * Covering materials are treated to pass federal flammability standards for motor vehicles. * Resinated fiber pads over the innersprings protect the comfort materials from premature wear. * Convoluted foam under the cover provides excellent support for the while providing a comfortable sleep surface. * All mattresses are individually wrapped in plastic and sealed in a corrugated carton to insure delivery of a clean and sanitary mattress. This information has been provided to us by the supplier.