These soothing eye pillows are filled with organic lavender and rice. Can be used either hot or cold to help soothe the eyes and sinuses. Each eye pillow comes with a case that has been hand dyed in USA grown and processed indigo. The pillow itself is made of 100% prewashed, unbleached muslin cotton. Use: Microwave for 25 seconds, let rest for 5 seconds before placing over eyes or place in freezer for at least 1 hour to overnight, then place over eyes. Cleaning: Remove case from pillow before spot cleaning. DO NOT wash pillow. Please note that because each case is hand dyed, patterns and color saturation will vary.