One-Piece Design: This Headache Relief Hat Provides 360 Degrees Of Natural Cooling For Your Head To Enjoy All Round Cold Coverage. It Is Designed In One Piece To Wrap Around Your Head Easily. This Stretchable Migraine Relief Hat Has An Opening At The Top Design That Allows Hair To Pass Through, Allowing The Cold And Pressure To Reach The Scalp. It Is Ideal For The Majority Of PeopleS Head Shapes | | Safe Material: The Inside Of The Gel Ice Cap Is Composed Of Expert Cooling Gel Which Is Harmless, Contains No Odor, Safe To Use On Uncovered Skin And Stretchable Even After Prolonged Freezing. It Also Fits Perfectly On The Head. You Should Not Be Concerned With Multiple Replacement Packs. When Compared To The Regular Ice Pack, This One Is Not Only Less Stiff And Discomforting But It Also Stays Cold Longer | | Migraine Relief: With The Help Of Cold And Pressure, This Migraine Relief Hat Deeply Relieves Headaches, Lessens The Stress, Anxiety And Improves Sleep Quality. To Relieve Fac.