If I remember correctly, the Warm Company quit making a batt for microwaving after having so many reports of microwave fires. Their product for that purpose was 100% cotton (unlike W&N and W&W) but there were fires anyway, and they didn't want the liability. A pot holder works well for taking a hot dish out of the microwave without the danger of causing a fire. You can then place the dish into a fabric bowl if you want it to look pretty, and that fabric bowl can use any type of batting. Just never place it in the microwave.