Zafu works better over the traditional Zabuton mat. Natural Zabutonn mat is crafted from chemical free organic Green cotton 10oz. duck as an outer cover shell and inner stuffing of pure cotton batting, giving a cushioned feel for your legs and ankles. Zafu are created in durable cotton twill in a variety of hues, pleated to get the desired shape with concealed zipper handle. Generously filled with buckwheat hulls to give it flexibility to contour. Total bliss- for meditating when you combine the Zafu with Zabutan with cover. Handmade in USA.