Ideal for cycling, hiking, fishing, skiing, and other winter outdoor sports. A safe choice, reducing your concerns about everyday radiation from mobile phones, WiFi, laptops, etc. Material: 42% silver fiber, 53% cotton, 5% polyester. Machine washable, hang dry. Unisex anti-radiation head shield, effectively blocking radiation from devices such as mobile phones, WiFi, Bluetooth, and laptops. Provides comprehensive protection for your head and neck, effectively protecting your head, neck, and thyroid gland from radio frequency (microwave/wireless) radiation from WiFi routers, base stations, mobile phones, and cordless phones.