Mask belt is the belt fabric used for gauze masks. It is a kind of tubular belt and has two types: hollow-core woven and woven. Usually 36.4tex (16 British count) cotton yarn is used as raw material, and it is woven on a knitting weft knitting machine or a loom. Woven with twill or plain weave. The gauze mask band used by adults is 0.3-0.5cm in size and 2.5cm in width.