Shield Apparel Ribbed Knit Beanie

Classic Navy ribbed knit beanie. Warm and cozy. Minimally used. Has been washed in free & clear detergent only as well as freshly lint rolled and shaved. If you have a very small head, this may not be the pick for you. WEBSITE description: The special shielding silver fabric inside the EMF radiation-blocking layover hat guarantees high screening attenuation, blocks low & high-frequency electromagnetic radiation and has antimicrobial, anti-odor and other active features. High-quality materials assure your comfort in all circumstances. It’s unisex and fits all head sizes. Shielding silver fabric technical details: Attenuation: 10MHz~40GHz, 40~80dB Surface conductivity: <10ohm/inch Shielding effectiveness: 99% https://shieldapparels.com/collections/emf-protective-headwear/products/signalproof-layover-beanie