Queen of the Thrones® original heatless, less-mess, reusable Pelvic Castor Oil Pack. PACK ONLY - Castor Oil sold separately Inner layer organic cotton flannel  Outer “less mess” layer polypropylene Nylon straps HOW DO I USE IT? Your Pelvic Castor Oil Pack is a simple 2 step process when paired with Organic Castor Oil (sold separately): Step 1: Apply 1 tbsp of Organic Castor Oil (sold separately) onto the soft cotton side of your Pelvic Castor Oil Pack. Step 2: Place the pack over your pelvic area and tie it in place. Click here for Castor Oil sold separately.