Castor Oil Packs have a reputation for being messy. That's why this pack was designed by a naturopathic doctor just for you to be LESS-mess. NO, it is not totally messless, but it's LESS messy than a do-it-youself pack. Always wear an old T-shirt over top, just in case. Note that your pack will become messy over time and should be replaced after approximately 60 uses.