Filled with Organic grown Buckwheat Hulls - Allows air to circulate for natural cooling comfort Will naturally adjust to your your ideal position for sleeping. May relieve common sleeping problems such as tension, muscle pain, stiff neck, headache, and stress Refillable so you can adjust the amount of hulls to your personal liking Used for centuries in Japan, the Buckwheat pillow is a organic, natural sleep pillow - perfect for anyone with foam or feather allergies as well as anyone who wants a better night's sleep. NOTE: Packaging may vary from listing photos.