UTV Stereo Sound Dampening Mat | UTVS-SDMThis Sound Dampening Mat is super thick to insulate your sound system. Use this high grade soundproofing material in your next build to reduce rattling and outside noises while driving. We use this damping material in car doors, boats, and any vehicle that needs extra insulation to create a more robust tone from your speakers and subwoofers. Single Sheet: 4ft Roll: 40ft Thickness: 3mm