http://www.isabelsehbe.com/yoga-towel/
if you do not have a yoga mat, is that you can do exercises like a beach towel or something?
of course, just make sure they arent laying the towel on something as concrete. a yoga mat is usually really move as much as a towel, however, so the person may want to invest in.
NamaSTAY Yoga Towels – Spring Collection