the regular voodoo floss bands are generally more than sufficient for most people and applications. note that if you ever want to floss your elbow or shoulders by winding the bands around yourself, then i would recommend the regular ones. it is already hard enough to wind around your arms, let alone needing to maintain the extra stretch of the X-bands – they have a tendency to either tire you and you can’t get enough pressure and/or whip out of your hands and then you have to start over.