RS ハット ビーニー (ブラック) | EMF保護、RFシールド

This hat/beanie made of high-quality cotton with RF shielding fabric protects the head and ears from electromagnetic radiation. It blocks wireless signals from devices like cell phones, Wi-Fi, Bluetooth, and 5G by 99.9%. Available in one size that fits most adults.

• The description claims that the hat blocks wireless signals from devices like cell phones, Wi-Fi, Bluetooth, and 5G by 99.9%.
• The description claims that the hat provides 99.9% shielding effect (~50dB).
• The description claims that the hat is designed to protect against wireless frequencies (microwaves/wireless) from devices like WIFI routers, cell phones, cordless phones.