Quality unisex black cap lined with silver threaded fabric, to shield the head from elecromagnetic radiation. Adjustable strap at the back makes it suitable for all sizes of adult head.
Highly effective 100% silver lining blocks 99.99% radiation in the 0.1Mhz to 3000Mhz frequency range, making it the ideal protective headgear.
Outer hat made from 100% woven cotton.
HAND WASH ONLY! To preserve the life of your hat hand wash only very occasionally in cool water (below 30 degrees) with a neutral detergent (not containing bleach). Drip dry away from strong sunlight. Do not bleach, do not dry clean, do not tumble dry, do not wring, do not iron. NOT MACHINE WASHABLE.