Heavy Drill Australian Cotton Yoga BolsterPLEASE NOTE THAT THESE BOLSTERS DO NOT HAVE A SECONDARY LINER. The cotton is stuffed straight inside the cover. Alternatively, if you require bolsters with removable covers(with an inner liner) click here. Heavier Cotton Drill Cover (made in India to our own specifications) Stuffed with Australian grown biodegradable organic cotton Strong Support Flat surface gives stability and contoured sides provide comfort Ideal when sitting against a wall, or