is the same as the direction of winding of the surface fibers the twist provided in this way in the core contributes to the strength of the yarn and provides a highly desirable liveliness in the yarn and this liveliness if released would tend to undo the winding of the surface fibers with the yarn of the invention there is a substantially uniform helix angle for the surface fibers with respect to the axis of the yarn suitable raw materials for the yarns which can be provided according to the invention include all of the available synthetic and natural organic textile fibers and combinations thereof natural fibers which may be used include cotton wool silk ramie flax jute hemp and the like suitable synthetic fibers include fibers of nylon polyester acrylic polyethylene polypropylene polyvinyl chloride cellulose acetate and viscose furthermore some fibers of inorganic matter such as glass and steel are also suitable the denier of the fibers used may vary over a wide range which may be from 1 2 to 100 depending upon the type of fiber employed and the requirements of the yarn typically when using fibers such as nylon polyester rayon cotton wool and other common textile fibers the denier will range from 0 75 to 15 yarns produced according to the method of the present invention preferably are within but not limited to the range of 200 3 000 denier thus it is to be understood that various modifications and departures from the above may be made without departing from the claimed invention in particular many various configurations of twisters can be used as long as such twisters are capable of acting upon the free fiber ends so as to helically.