Our lavender eye pillows / masks are made fromall-natural ingredients - long grain white rice - dry lavender buds - 100% cotton exterior and lining - packaged in a white paper sleeve and cellophane bag - full instructions and ingredients are printed on the interior of product label wrap. To use: Use at room temperature or microwave briefly for approximately 20 seconds to provide warm soothing relief and diffuse organic lavender essential oil aromatherapy. Keep in the freezer as a cool therapy to help with muscle pain and puffy eyes.