Master Massage Table Large 9" x 28" Semi-Round Bolster New $28 USD / Never Used / Selling for $20 Silky smooth Easy-to-clean PU upholstery and foam filling provide superior comfort and support for your clients. This semi-round bolster is flat on one side to prevent rolling. Place under the knees or ankles to align the vertebrae and relieve stress on the lower back. - Blue Color - Web Site: https://www.mastermassage.com/products/master-massage-large-9-semi-round-bolster-royal-blue