DYNOSKIN Felt Liner 200 mil 36 sqft Car Sound Deadening & Heat Insulation mat - non woven felt Sound Deadener Material & Heat Barrier Non woven Felt liner is the best for car, with an adhesive layer 100% ensures optimum efficiency and thermal insulation that could be possibly gained. The price of 1 sqft of Felt Liner with similar characteristics is more then three times cheaper! Excellent quality for less money!!