It's summer time and perhaps you are looking for some lightweight sneakers to do some "hiking yoga." These running shoes from Avia are made from a cooling mesh, so you'll get lots of airflow. They are also thankfully not super bulky - you won't feel like you are clogging around in big workboots in these.
OK, before you get all excited, these "yoga mat" flip-flops are not made from recycled yoga mats. They are simply made from "yoga mat" material. Since yoga mats are made from a variety of different materials, these are some sort of cushy synthetic that has a "springy" quality like a thick, plush yoga mat. (Actually, I find most yoga mats to be a bit more stuff than these shoes.)