It is filled with bead fiber inside. The exterior is made of cotton flowy fabrics. It is used for dough leavening, yoghurt fermentation and rice brewing. You can preserve meals that cool quickly, such as rice. Machine washable, no fading or sticking.*Dough proofing cover&cushion&pouf&overall*5 - 7 liters volume, 80 cm diameter. This product is produced in our own facility.