.E-M-F Skull Cap Hat, Using a Thin Bamboo Lyocell Fabric - EcoShield™ Fara-Day Fabric - Wear Under a hat or on its own - Ideal for Everyday 5 G, B T, Smart Meter & Wi Fi environments Grey

I bought this to wear at night as I sleep and stop EM from interfering with my sleep. (thought I'd test the theory at least). I loved it when it came, but was disappointed that it 1. doesnt have a tight enough band to keep it from coming off your head, especially while sleeping. 2. the seams became unstitched after about 3 days and to try and sew such thin material again is something I dont even want to try. I would have expected for such a high price, the quality to be equal to that much money. Sadly, amazon's return window has passed and I have no recourse but to deal with it. UPDATED:::: I have to write an update on this simply to share how fantastic the customer support was on solving this issue for me. After seeing my review, I was emailed by the company and was helped completely to solve the issue. They are friendly and wonderful to work with. I'm very happy with my purchase and thought it would be fair to point out how quickly and kindly they worked to solve my problem. I would highly recommend this company!

Best emf blocking head cover. I am sensitive to the different levels of radiation we all cope with on a daily basis. This cap is stylish, functional, and effective. I have noticed a big difference while wearing it.

Slightly too thin, once the material "breaks in" it takes on weird shapes from your hair. Not enough elastic in the headband, so you have to adjust it regularly. Wont stay on while I sleep. Tests pretty well at EMF protection but slightly worse when expanded to mimic being worn. I would buy it again.

Thin and cheap Looks nothing like the picture and it's over priced for what it is . Not a good purchase

I bought it for my nephew who is receiving chemotherapy treatment and asked me to get on E-M-F beanie for him. He loves the softness and it fits perfectly. He’s very happy that he can wear his colorful themed beanies over it with no problem.

It does not block all the emf like it says. I've tested it, and even double covered it for signals, and they still penetrate. It is very thin. :-(... Good thing? It looks loke the pics and was well put together. Overall, too bad given it was not cheap.

Fits just fine, my hat size is 7 1/4, with crew cut. Many people with "big hair" say its too small, I can't say anything about that. It does block EMF very well. I got this one because it is thin and light weight to block EMF, not cold weather.

I love this cap! Until I started wearing it to bed, I don't recall having dreams when I sleep, which makes me think I was not getting REM sleep. From the first night wearing it, I've had dreams. The cap is lightweight and comfortable.