1PERFECT FIT: Our castor oil neck pack is micro elastic that could fit comfortably around most neck sizes, ensuring maximum effectiveness for thyroid issues. 2REDUCE PAIN: The castor oil wrap can help alleviate muscle pain, reduce inflammation and alleviate thyroid problems, improving your life. 3MAXIMUM ABSORPTION: This thyroid castor oil pack increases the contact between your skin and the oil, improving absorption and promoting optimal results. 4EASY TO USE: Simply apply castor oil to the middle of the castor oil pack, adjust it to your neck. Machine washable and reusable. 5MAXIMUM COMFORT: Our castor oil pack is lined with soft, absorbent fabric, has a waterproof coating on the inside to prevent leakage, and is made with breathable fabric to keep you comfortable during use.