There are a number of factors involved in selecting a yoga mat. The first is price. You can spend anything from about 20 dollars (actually I have seen economy mats where you can get to under 10 dollars a mat if you are buying a minimum number of mats) to over 100 dollars. How much you decide to spend will depend on how important various of the other factors are for you.
A while back I mentioned that I felt it was good, if at all possible, for someone who does yoga to have a mat. Several conversations in class lately have brought to my mind that it might be helpful for me to give a little background, and purchasing and care tips for yoga mats.