Our yoga bolsters are made with durable foam cores, heavily wrapped in 100% natural cotton batting to provide comfortable, firm support to your back, abdomen or legs. The yoga bolster covers are made of 100% natural cotton or beige hemp and are removable for washing. Colors: Natural, Beige Hemp, Purple, Navy Blue, Medium Denim Blue, Red or Black Available Styles: Approx. Size – Round:. 9″ Diameter x 27″ Long Approx. Size – Rectangle: Approx. 12″ Wide x 6″ High x 24″ Long