Included with the half-moon pillow is a stylish, grey cover which is removable and machine washable to provide hassle-free cleanup. Knee Pillow for Back Sleeping | Large Half Moon Bolster Pillow for Legs, under Knee Pillow for Sleeping on Back (20.5" X 8" X 4.5") Leg Pillow for Ankle and Foot Comfort, Machine Washable Cover, Grey.
eBay