In some embodiments, electronic data may be automatically captured to provide a user with a universal Internet identity and e-mail address, comprehensive e-mail filtering and forwarding services, and e-receipt identification and data extraction. More particularly, it concerns a method for making multifilament yarns comprising hollow filaments obtained by melt-drawing of a polyamide composition having a yarn count less than 10 dtex for each staple and whereof the staples with hollow section have a central hollow surface representing at least 5% of the total surface in said staple transfer section. At least two fingers of each of the side wall portions include a hook protrusion for cooperating with the cover to permit the cover to be alternately rotatable relative to either of the side wall portions.