1. KPS HVAC ductwork insulation mat is made of wool fiber 2. It is free of formaldehyde 3. Perfect human comfortableness 1.Material: Natural sheep wool with aluminum foil facing.2.Performance of HVAC pipe insulation mat: Does not emit formaldehyde and other toxic gases. Excellent thermal and acoustic performance , Contributes to MR C4.1, MR C4.2, MR C6, EQ C3.2,and EQ C4.4 items of LEED.3. ...