1. Silk and cotton tulle
This is an earlier material, and it is used less now. Although both of these materials are harmless to the human body, the sealing performance is relatively poor and easy to fall apart.
2.pet yarn
Pet yarn is a kind of polyester fiber. This material gives people a special texture and can clearly see the shape of the tea inside. The sealing is also quite good. This material does not have any toxic substances when soaked in water, but it is not very resistant to acids and alkalis under high temperature conditions, and is not very friendly to some teas.
3. Nylon filter cloth
Food-grade nylon filter cloth is more in line with national health standards. You can also see the true situation of the tea inside through the transparent net. This is also a better material.
