Ergonomic pillow cushions your knees to support the lower back and hips and align the spine. Provides squaring support after hip replacement, too. Removable, machine-washable cover is soft, 100% cotton. Adjustable strap lets you tighten or loosen the pillow to your preference. Polyurethane foam with a 95% poly/5% cotton cover.  Cover is removable and hand washable.  Imported. 10” L x 8” H x 6” D.