Our brand new Smart-Safe pillow is the ultimate solution that combines maximum comfort and maximum protection from EMF sources. The new Smart-Safe is a product of years of studying and blocking radiation on different scales in combination with a deep understanding of what our end consumers want and need. We have developed a new type of material based on our Pro Silver-Fiber technology, which we enhanced to provide you with the best protection that can easily shield you by up to 99.9% from all RF-EMF radiation at frequencies ah high as 40 GHz. That covers frequencies used in the fifth generation of wireless networks. The Smart-Safe is excellent in protecting you and your loved ones from all wireless RF-EMF radiation emitted by any source, such as Wi-Fi routers, Mobile phones, DECT phones, Microwave ovens, Tablets, Laptops, etc. Frequency range and shielding effectiveness: Frequency range: 10MHz-40GHz Shielding effectiveness: 49.1dB-71.4dB The main radiation protection component: 100% Silver fiber Features: Machine washable and dry-able. Luxurious hypo-allergenic flannel, comfortable against the skin. Available in two sizes: Medium: 15.7" x 9.8" (approx. 40cm X 25cm) Large: 17.74" x 13.7" (approx. 45cm X 35cm)