Your brain doesn't get a day off, and neither should your protection. The Halsa EMF Blocking Beanie in Black is built for everyday wear — a streamlined, all-black design that fits into your routine as naturally as your morning coffee. The two-layer construction pairs a soft acrylic exterior with a silver fiber interior lining that blocks 99.9% of EMF radiation from WiFi, 5G, Bluetooth, and cellular signals. Wear it to the office, on your commute, or anywhere your day takes you. Blocks 99.9% of EMF radiation from WiFi, 5G, cell towers, and Bluetooth Two-layer design: durable acrylic exterior with silver fiber radiation-blocking interior Classic black colorway pairs with virtually any outfit Lightweight and breathable for all-day wear Snug, fitted silhouette stays in place through an active day Silver fiber maintains effectiveness through repeated washing Materials: Acrylic exterior, silver fiber lining. Silver fiber composition provides tested EMF shielding effectiveness across 10 MHz–3 GHz frequency range.Care: Hand wash cold with mild detergent. Reshape while damp. Lay flat to dry. Do not wring, bleach, or machine dry.