The name of modern trousers is that the trousers are not flushed upwards like the briefs, but are flush, so they are called flat trousers. There is a simple type of boxer trousers with the same structure of the front and back trousers, which are sewn together, and use crotch cloth to widen the crotch and lengthen the straight crotch. Therefore, the material is more economical and more daily wearers. It is more popular because it is loose and comfortable and breathable when worn. Most of them wear men's pants, and fewer women wear them.
