As you place your head on our pillow, your neck will be cradled by the light and airy millet hulls allowing your spine to be aligned. The pillow keeps the neck in a neutral possition and can reduce the stress allowing your muscles a chance to recover. To adjust the amount of hulls, just open the zipper and remove 1 to 2 cups at a time. To wash the pillow, open the zipper and remove all the hulls. Machine wash cold with like colors. Do not bleach. Tumble dry low.