Spring and autumn style double layer windproof warm pullover hat for women1. Product features:Size: adjustableColor: navy blue materialFeatures: Outer fabric Fabric: Cotton Inner material Lining: Nano silver fiber (radiation protection material). 2. Product features: Nano-silver fiber worsted technology, good shielding performance, light and thin material, good breathability; washable and durable; the protective material suitable for civilian use is a green environmentally friendly cloth; anti-radiation, anti-static, and can be tightly adhered.3 Product use: Used for electromagnetic radiation shielding protection, suitable for various places with radiation; reducing high-frequency radio frequency electromagnetic fields from wireless network modems and routers, Bluetooth devices, smart meters, cell phone towers, mobile phones, microwave ovens, cordless phones and security systems Radiation generated; Reduce radiation generated by low-frequency electric fields such as wires, electrical boxes, household appliances, high-power transmission lines, etc.; Effectively protect the head (abdomen).4. Product cleaning method: Radiation-proof products can be cleaned directly with ordinary neutral washing powder or liquid. The washing method is similar to ordinary clothes; Radiation-proof products are washed by hand and try not to use a washing machine; Do not wring out after cleaning, take them out of the water and dry them directly; The water temperature should not exceed 90 degrees; the ironing temperature should not exceed 150 degrees; do not bleach or use washing products containing bleach.