Nylon

Package includes: you will receive 1 roll of black elastic string, of which is 50 m; 200 black threaded cord locks and 100 aluminum nose bridge strips; you can use these accessories toggles for DIY; pass the elastic string through the cord lock, and adjust the elastic string with cord lock to a length suitable for your face, can be applied to most adults and children
Practical elastic string: each elastic string is about 50 m long and 1/8 inch wide, durable and breathable; the high quality nylon with great tensile strength will not make you feel painful when wearing
Threaded cord locks: we provide you with 200 threaded cord locks, which are made of high quality silicone, soft and durable, not easy to wear out, will not fall off easily after they are secured; can be used for a long time