DefenderShieldEMF Radiation Blocking Beanie Cap - Blocks Wireless Radiation (Gray)

Not gonna lie. I was expecting this to be garbage and not block any signal at all. But I put my phone in it and held it shut while my wife called my phone. It went straight to voicemail. Then I opened the hat but left the phone in it. It still wouldn't ring through. When I pulled the phone out, I saw that sure enough it didn't have any signal in the hat. So then I had my wife call my phone, I answered, and then while it was connected, I dropped the phone into the hat. The call disconnected immediately.I'm impressed. I only got the hat today, so I can't speak to its durability. But it certainly does what they say it does.My only complaint is that its a big small. But I also have a freakishly large head. It would be cool if they made a freakishly large size for people like me.

Very tight fit on my small head, and the Faraday fabric did not stop any transmission of signals under my testing

Product looks like it protects, but it's too small and the silver shielding doesn't go down enough to cover the forehead or the lower side of the back of the head.

The idea is great but skimpy on the actual hat. Too small for my small head. I can’t imagine someone with large head. Have to keep pulling it down.

Looks nice, but the faraday fabric doesn’t even reach my temples, it’s akin to a yamaka and I do not feel protected in the least. They could have easily sewn-in loose EMF fabric into the lining to get around the lack of elasticity, but they didn’t. Terribly over-priced for what’s offered, and far, far too small.

Great comfy hat, sleep seems to be better.

The Bernie was to small