Flaxseed Aromatherapy Neck Wraps. These can be warmed in the microwave to be used as a heating pad or placed in the freezer for a cold pack. They can also be used anywhere on the body. Made with medium weight 100% cotton fabric for durability and strength. These make the perfect gift for anyone on your gift list or you can just treat yourself to one. They can relieve muscle tension, period cramps, headaches or migraine pain. When frozen they can help bring down swelling and reduce a fever.