1Cold Or Hot Packs: come with a pouch designed to store hot, cold pads for faster absorption or soreness reduction when necessary. 2Multifunctional: Nourishing, calming inflammation and stimulating blood flow, castor oil lumbar support helps you get a good night sleep, improves circulation, intestinal drainage and digestion. 3Adjustable: Neck and waist packs can be freely adjusted to fit your waist and neck circumference, making them more adjustable and easier to handle. 4Skin Friendly Design: Castor oil patch for thyroid can maximize the contact between skin and castor oil, and improve the utilization and efficacy of castor oil. 5Cotton Material: Constructed with cotton, very soft to the skin, hypoallergenic, suitable for sensitive skin types, tightly woven to ensure castor oil is absorbed into the skin.