Nonwoven fabrics are placed between fabric layer.s in areas where more stability, body and support are needed beyond the fabric thicknesses themselves. Perfonnance of nonwoven fabrics are based on their quality related mechanical characteristics. Important physical and mechanical properties of nonwoven fabrics used in gannent industry include tensile strength, tear resistance and air permeability. This paper investigates the relationship between nonwoven surface mass to the tensile strength, tear resistance and air penneability. The experiments indicate that tensile strength, tear resistance and air penneability have a relationship to surface mass. When nonwoven surface mass increases, tensile strengths in vertical and horizontal direction go up dramatically, the horizontal tensile strength is much higher than the vertical tensile one. In contract, the nonwoven vertical tear resistance is much higher than the horizontal tear one. Air penneability goes down by quadric equation.