ePTFE of Sanga Frontech Co., Ltd. is expanded Polytetrafluoroethylene with hundreds of millions of nano-sized pores per square centimeter developed by original technology. The generated nano-sized pore is a core material that discharges steam particles (1nm or less) and prevents penetration of water particles (500㎛) and gives breathable and waterproof function to outdoor and sportswear, thereby providing a comfortable feeling. It is possible to develop post-processing technology to improve performance.