Golden KocoonFaraday Organic Cotton Beanie in Grey, with a Bamboo Faraday Fabric Liner - Shield 5 g, Cell Towers, Smart Meters & WiFi - Hat Cap, Grey, One size

Am so glad I bought this nice-looking beanie. It fits my head well and I have a fairly large head for a woman. I love wearing it indoors in the evening to help me feel more at peace knowing I'm doing what I can to protect myself from all my neighbor's WiFi in my apartment complex. My "tinnitus" was drastically reduced and I slept much better on my first night of wearing it. Especially love that it's fabric breathes and doesn't retain heat. So comfortable.

So I haven't actually tested the efficacy of the emf or wifi blockage, but I can say it's very comfortable. I'm a small woman with a small head and it fits great. Like others have said, it is small, so if you have a larger noggin, I wouldn't suggest it, or if you're OK with a tight fit, then maybe it's for you. I wore it last night to bed to see if it affected my sleep, and while I can't say for sure, I feel like I slept great and soundly for once. I'd def buy again and recommend.

Nice hat but I agree with reviewers who find it quite small. My hat size is 7 1/8 which is not exactly large. I liked the hat at first although it was snug. But it becomes uncomfortable after an extended time of wearing.

I almost did not buy this beanie because of all the negative reviews about it being so small as I know from a lifetime of hats that I have a big head for a woman. It fits beautifully and looks quite good. I have not yet tested its effectiveness but plan on wearing it when I fly next week.

A tin foil hat that deserves a place in your wardrobe