https://www.fysensi.com/products/round-ear-loop/ Ear loop for surgical face masks are made of spandex and polyester fibers. The Overview of Round Ear Loop Round elastic earloop for surgical face masks are made of spandex and polyester fibers. In the process, no chemicals compounds are added. Polyester and spandex filaments are eco-friendly and have no pungent smell. They will not make people feel sick or hurt the health of users. The conventional diameter of round ear loop is 2.8-3.2MM. According to the requirements of the customer, the specification can be customized. Round ear loops are mainly applied to the production of disposable face masks, medical, children's face masks, medical disposable masks and surgical protective masks.