Plain bed sets can come in all kinds of materials, from cotton to polycotton, full polyester, silk, satin, linen and so much more. However, because of the wide range of benefits, cotton or polycotton plain bed sets tend to be most popular. This is because they are both very breathable types of bedding and easy to care for with benefits of cotton being that it is a super soft material when the thread count is above 200. The benefit of polycotton is that you don’t need to iron it for it to look really presentable on your bed. Polycotton also tends to be a better option for cheap plain dye bedding. However, either would be a great choice!