perfect work ergonomic double strand 1680D pink sport bag sport athletic bag single shoulder bag 1.material: ergonomic double strand 1680D polyester, the material are water proof and enviroment friendly,up to 6P standard. non phthalate, non AZO.2.we have our own R&D team,all of our bags are designed by ourselves, our technicians specialise in bags for more than 6 years.3.exquisite workmanship, ...