Upgrade your Peterbilt 389's sleeper area with our precision-engineered 36" Bunk Floor, exclusively designed for a perfect fit. To achieve a flawless and quiet surface, we recommend using a layer of Sound Skins Pro Plus sound deadener under the floor. Enjoy the benefits of enhanced insulation and comfort, with the added bonus of Free Shipping on your order. At Spare Time Fab, we bring you top-quality products tailored for your trucking needs, ensuring seamless enhancements and superior performance. Trust in our expertise to provide unparalleled value and convenience for your Peterbilt 389.