ANSWER:

There’s no need to wash such clothes if there’s no impurity on them and you can also pray in such clothes.

During menses, there are times we change our clothes if we are going outside or wear an abaya, so is the cloth or the abaya required to be washed again thought no impurity was on the cloth or in the abaya. The cloth still touches the private part without getting stained or dirty, so will the cloth be also pure or should I wash it for the next use?