• Mini sized heatless, less-mess, reusable Castor Oil for the Neck. Designed by a naturopathic doctor, the Neck Pack is made with an inner 100% organic cotton layer that touches the skin, an outer less-mess layer of polypropylene, and an adjustable nylon strap. • Castor Oil (sold separately) is also very moisturizing and conditioning for the skin and may help reduce the appearance of skin aging on the neck.