Trust in Hilph – Whether you need heat or cold, compression or stability, we promise that Hilph's migraine relief hat ease your suffering and provide unmatched support. Backed by a 90-day satisfaction guarantee, your purchase is completely risk-free!. ?Cold Therapy - Use cold therapy and let the ice pack cap refrigerate for 1-2 hours or freeze for 20 minutes. Put the whole product include the gel pack in the package and put it in the freezer. If you want to perform hyperthermia, put it in microwave for 10 seconds. Hot compress is generally not recommended. ?Natural Cooling Therapy Headache Relief - The reusable & wearable therapy ice pack for migraines helps inflammation, tension, sinus and stress relief and puffy eyes, making it the ideal reusable headache relief hat for men, women who suffer from headaches, migraines or facial tension. ?Anti-slip & Hands-Free - The inside lining is skin-friendly and non-slip cloth in case of sliding off. It can be used sitting, standing, or lying down, and enjoying full range of movement and great mobility. It's comfortable to wear, easy to put on and take off. Suitable for both men and women. ?360°Cold Compress Migraine Relieve Hat - Hilph headache relief hat/ cap filled 4 sides each an ice pack for 360° full coverage. Soft plush and durable nylon fabric no peculiar smell, high quality. One size fit up to 60cm/24 in circumference. It's not just a wearable headache ice pack that provides cooling relief, it's also a great migraine mask to block the light, soothing and helping you sleep more peacefully.