★ Dear EU customer, due to EU tax policies, platform will not impose taxes on orders exceeding 150 euros. You need to go to customs to pay taxes yourself. If your order contains multiple items, resulting in a total order amount exceeding 150 euros, please split it into multiple orders (so that each order does not exceed 150 euros), which can avoid you personally going to customs to pay taxes or reduce the situation of not being able to receive the goods. What is electromagnetic radiation? Electromagnetic radiation is "non-ionizing radiation," including microwaves and electromagnetic fields (EMF). Any type of electrical appliance produces non-ionizing radiation, including cell phones, computers, televisions, wires, and ultrasound. Hazards of electromagnetic radiation: Electromagnetic wave radiation has been listed by WHO as the fourth largest source of environmental pollution after water, atmosphere and noise. It has become an invisible “killer” that harms human health. Electromagnetic radiation can generate a lot of free radicals, interfere with communication between cells, and hinder hormones, the release of (such as melatonin) causes cancer, leukemia, cardiovascular and cerebrovascular diseases, miscarriage, menstrual disorders.  Product's scope of application:1. People who use computers for a long time;2. Radio and television, communication, navigation, radar and other transmitting equipment room near field staff;3. People with weakened immunity living near communication base stations and radio stations;4. Industries such as metallurgy, electronics, chemicals, papermaking, wood, grain, and food processing;5. Operators who use high-frequency and microwave equipment for smelting, welding, heating, exhaust, sputtering, drying, insecticidal, disinfection and other processes;6. Personnel who operate and use medical instruments such as radio frequency and microwave for a long time;7. A salesperson who uses a microwave to heat fast food;8. Commissioning personnel in the production of electronic equipment and instruments;9. Workers of power generation and high-voltage transmission and transformation stations;10. Staff in the military electronic station equipment experimental area;11. Pregnant women, etc. Size information Men’s sweatshirts size chart (unit: cm) Size M L XL XXL XXXL XXXXL Clothes length 65 67 69 71 73 74 Chest circumference 100 104 108 112 116 120 Shoulder width 44 45 46 47 49 50 Sleeve length 60 61 62 63 64 65 Women’s swearshirts size chart (unit: cm) Size S M L XL XXL XXXL Clothes length 54 56 58 60 62 64 Chest circumference 88 92 96 100 104 108 Shoulder width 36 37 38 39 40 41 Sleeve length 56 57 58 59 60 61 Hem 78 82 86 90 94 98 Size description (unit: cm)* Pure manual measurement, there may be an error of 1-2cm, which is normal, please understand!  Hoodies size information Men’s hoodie size chart (unit: cm) Size S M L XL XXL XXXL XXXXL Clotheslength 61 63 65.5 68 70 72 73.5 Chest circumference 103 107 111 115 119 123 127 Shoulder width 45.5 47 48.5 50 51.5 53 54.5 Sleeve length 57 58.5 60 61.5 63 64.5 65.5 Hem 82 86 90 94 98 102 106 Women’s hoodie size chart (unit: cm) Size S M L XL XXL XXXL Clothes length 54 56 58 60 62 64 Chest circumference 88 92 96 100 104 108 Shoulder width 36 37 38 39 40 41 Sleeve length 56 57 58 59 60 61 Hem 78 82 86 90 94 98 Size description (unit: cm)* Pure manual measurement, there may be an error of 1-2cm, which is normal, please understand! Electromagnetic radiation protective 100% silver fiber knitted lining sweatshirts or hoodie (Outer fabric: 95% cotton and 5% spandex, inner fabric: 100% silver fiber knitted fabric)Frequency range: 10KHz-40GHzShielding effectiveness: 47.2dB-68.6dB Silver fiber fabric analysis: The silver fiber is a high-tech product obtained by permanently bonding nano silver ion to a fiber surface through a special technique. This structure not only makes the silver fiber maintain the original textile property, but also gives it all the The magical function of silver. silver fiber fabric has the functions of radiation protection, anti-bacterial and anti-fouling. It's anti-radiation effect is superior to radiation-proof fabric made of other metal materials. Electromagnetic radiation protection silver fiber fabrics exhibit excellent shielding performance under high-frequency electromagnetic radiation environments. The greater the shielding effectiveness value at a certain frequency point or frequency band, the better the protection effect, which is usually 30dB (equivalent to a shielding r