Haptic information in a series of frames of a media file is identified and time stamps corresponding thereto are determined in accordance with information embedded in a tag either preceding or appending the media file. The portable handsfree device has an audio interface over which a user may conduct voice calls, a processing unit, and a memory unit. The link mechanism 1 comprises a crank member 2 having a crank shaft 3 and an eccentric shaft portion 4, a pivoting link 5, a connecting rod 7, and a restraining link 8. 22 micron membrane and the support layer is a grid or sintered porous material. Removable andor replaceable footbeds may be employed, and such footbeds may provide adjustable sizing of the article of footwear using interchangeable cartridges.