It is filled with bead fiber inside. It is a swelling material that does not clump during washing. The outer shell is made of cotton fabric. It is used for dough fermentation, yoghurt fermentation, rice brewing and food resting purposes. You can preserve meals that cool quickly, such as rice. Machine washable, does not fade or stick. It has a volume capacity of 7 liters and a diameter of 80 cm when opened. This product is produced in our own facility.