The description of the fiber motion in air flow is important for some processes in textile industry that is based on the air-fiber flow. One of the most significant textile processes which used for producing the textile fabrics in many industries is the air-texturing process. This is because of the new technical characteristics which this process adds such as increasing the durability of the fabrics, particularly flat-woven fabrics and this process also provided answers to many of the problems of consistent quality and durability encountered with other yarn technologies. One of the applications of air-texturing process is the use of textile products for vehicle trim areas which has a relatively recent history.