without losing the cushion of the foam latex layer if the waterproof thin film is finished with a texture pattern the floor mat is stabilized wherever it is laid because the floor mat resists slipping displays slip prevention function because the felt layer and the foam latex layer are formed as a double layer as a backing material to the floor mat the double layer displays two types of absorption functions a porous type sound absorption and a film vibration type sound absorption this is especially true when the floor mat is laid on the primary carpet of the automobile wherein noises such as road noise engine noise and wind noise to name but a few are effectively absorbed or interrupted and the quietness in the automobile room is improved polypropylene cloth is preferably used as the backing cloth 3 and bcf nylon yarn is used for the pile layer 2 the nylon yarn is tufted by hand from the lower face 8 of the backing cloth 3 and forms the pile layer 2 on the upper face 7 of the backing cloth 3 in order to stabilize the pile layer 2 a styrene butadiene rubber group latex compound is spread on lower face 8 of the backing cloth 3 and allowed to dry the rate of sound absorption can be classified by 2 types of measurement methods the first type is the reverberation room method sound absorption rate the second type is the vertical irradiation sound absorption rate the vertical irradiation method is used in the event the reverberation room method cannot be employed due to equipment requirements such as a reverberation room and a large quantity of test pieces in the vertical irradiation method a test.