Cork yoga mats are great. They were originally created for paddle board yoga (they wetter they get, the stickier they become), but they of course aren't limited to PDY. A lot of yogis like to use cork mats in hot yoga classes because they get stickier as you sweat more over the course of the class. They are easy to clean and eco-friendly, but not very cushiony. If you have bad knees and need a thick mat for support, this sort of mat is not for you. I hope this helps!