Air filter raw material is made by polyester, which can tolerate high temperature. Generally, these materials are made by PP injection process, or thermal bond process. And these filters are widely used for Japanese cars, Korean cars, and Chinese cars.
High elastane 2040/34F Nylon single covered spandex yarn for seamless from zhejiang kang jiesi which has professional in covered yarn making for more than 20 years.This is can be used for making seamless underwear with soft touch.