Are a long shirt and trousers sufficient to cover one's adornments in front of paternal cousins, along with covering the hair? And is it permissible to go out in them from her home to her family's home if the distance is short and walkable?

If the shirt is long and flowing, reaching below the calves, and not open from the chest or middle, and the trousers are long, covering the feet, then we hope there is no objection to wearing it in front of non-mahram men or going out in it. However, if it is not like that, then it does not achieve the religiously required covering, so it is not permissible to go out in it or meet non-mahram men while wearing it.