As someone who gets migraines, I can't tell you how game-changing this MyHalos relief cap has been. It's basically a wearable ice pack that you slip over your head like a hat, and the cooling relief is almost instant. They've used double the amount of medical-grade gel compared to other brands, which means it stays cold twice as long - seriously, when you're in migraine pain, every extra minute of relief counts. The 360-degree wrap-around design is genius because it covers your entire head, including temples and forehead, with this clever U-notch around the nose so it's actually comfortable to wear. It's completely stretchable and fits any head size without needing annoying straps or fasteners. The material is cloud-soft and doesn't get stiff and bulky like some ice packs do. It comes with this nice storage pouch too, which keeps it clean and odor-free in your freezer - no more worrying about freezer smells transferring to the cap. I've used it for tension headaches, sinus pressure, and even after dental procedures, and it works amazingly well for all of them. You can wear it sitting up, lying down, whatever position gives you relief. It's leak-proof too, which is great peace of mind. If you suffer from migraines or chronic headaches, this is definitely worth trying - it's become my go-to for immediate relief when medication alone isn't cutting it.