Lead-free radiation protective fabric has been 100 % imported from other countries so far until SME company, STS networks, developed their own and commercialize it.Many hospitals and nuclear station employees are usually wearing lead-material radiation shielding clothing. These are very harmful to human as well as environment but there was no better solution than using expensive materials from USA. STS networks finally solved this problem for the first time in Korea.STS networks (CEO Bongwoo Lee