This upgraded migraine relief cap provides instant headache relief through cold therapy and heat therapy to the head and face. Featuring full 360 degree coverage of the entire head, with a hole in the back to let out hair, this heavyweight cap, has been made with breathable nylon fabric and filled with a medical grade gel which retains heat or cold for longer lasting relief than other models. This results in a great hot or cold compress for immediate relief from migraines, headaches, tension, pressure, puffy eyes and sinus congestion. Great for work, travel and sleep!