I often get this question.
There are lots of options and different factors to consider including thickness, grip, maintenance, portability/weight, eco-friendly material, cost, etc. Personally, I've been very happy with my Manduka ProLite, but I'm curious to try some other mats mentioned in this guide. Check out this Guide to the Best Yoga Mat of 2017 for more info.
What Kind of Yoga Mat Should I Get?