Comfort EXTREME PRO MAX - 5 Sheets 8mm 350x470mm Sound Deadening Mat KitComfort EXTREME PRO MAX 5 Sheets 8mm 350x470mm Sound Deadening Mat Kit Comfort Mat EXTREME PRO (EXTREME series) is a 8 mm double foil sound deadening mat with high rigidy used in areas with high vibration load, and for amateur and professional sound competition cars. Using low temperature processing technology with the addition of special polymers increased the mechanical loss factor and reduced the weight. NB! Material must be heated up to 50C before