Elastic bandages are "stretchable bandages used to generate local pressure". Elastic bandages are usually used to treat muscle sprains and strains. They reduce blood flow to specific areas by applying steady pressure, thereby limiting swelling in the injured area. Elastic bandages are also used to treat fractures.
One is made of pure cotton absorbent gauze or non-woven cloth material with filter paper in the middle, so as to improve the filtering effect of non-woven cloth mask.