This hat insert is for a 8 panel newsboy cap. The insert is four layers of metallic copper and nickel fabric, a layer of light blocking rubber fabric and covered with black broadcloth to protect the insert. You can wash the insert in cold water and liquid detergent. Do not wring, just pat dry. You cannot put this into a washer or dryer. AIR DRY only.
The insert can be worn by itself or can be put into a hat band so the shielding continues into the hat band, to cover the ears, blocking frequencies into and in back of the ears.
$95 includes shipping, tracked and insurance.