WHAT IS IT MADE OF? Your Castor Oil Pack is made of an inner layer of soft organic cotton flannel, an outer less-mess layer of polyurethane (PUL) that is heat-bonded (a cleaner alternative to chemical-bonding) to a middle layer of organic cotton flannel, and four 30 stretchy nylon straps that can wrap around and secure your pack in place so comfortably you can sleep in it. WHY DO I WANT ORGANIC MATERIALS? Everything that sits on the skin can go deep, and when you use a carrier oil like Castor Oil you would want to avoid fabrics with chemicals, bleach or artificial colors, and even bamboo fabric which is also made with hard chemicals. HOW DO I USE IT? Wear for 1 hour daily or ideally, overnight with 1-2 tbsp of organic, extra virgin cold-pressed, hexane-free castor oil ALWAYS in an amber glass bottle. Never use castor oil that is non-organic or bottled in plastic to avoid hormone disrupting chemicals. Replace after approximately 30 uses (or 2 months). Do NOT use castor oil packs when pregnant. Please check with your doctor if it is right for you. WILL IT FIT ME? The compress is designed to fit over the typical size of the adult liver, fitting most bodies with its long, soft straps that hug curves so comfortably you can sleep or go about your daily to dos wearing it. GREAT GIFT: This self-care tool is the perfect gift for the natural wellness lovers in your life.