I tried the neck wraps and they didn't last long enough to really help me out. When its really hot out, I freeze plastic pop bottles full of water and pretty much carry them around with me (they are messy) but found them of great use when I would apply them to my neck or wrists or any pressure point. I wrap a large wash rag around them to absorb the water sweat and then I end up with a cool washcloth too.

Because the gel-filled neck wraps don't last long, as Karilann said, I generally use them to help me recover from getting overheated. Laying one over my head and gently pressing against my ears is Heaven!

If I was to need cooling away from home, I'd take two neck wraps in either a cooler or ziploc bag of water.

I also have found frozen bottles of water to be a great thing (plus I can have a cool drink as it melts). I have also been known to grab a total strangers slushie a time or two in the past when I got desperate at some festival

God bless my husband for quickly explaining and buying them new ones fast

Bought a couple of the bags at a sports good store in camping section that are designed to put thing in water tight. I filled them with water & froze them. I refilled them with ice from dispensers after they thawed ( at this point they thaw much quicker) but ice is everywhere . I like fashion scarves so I placed it on my neck and affixed it with the scarf. I look a little like a hunch back but not that bad. Definitely helps. If you are on a plane the attendant will refresh the ice in it for you...I travel a lot for work and don't have acces to keep putting cooling devices Ina freezer. Always be sipping on something cool..that helps me too. Good luck and have fun!