Is it permissible to pray in clothes that reveal what is beneath them and sometimes expose parts of the body, even though they cover the entire body, or must the clothes be thick?

For a woman's prayer to be valid, she must cover her entire body except for the face and hands. The clothing must also be opaque, not revealing the skin color. Therefore, if the leg is exposed during prayer, it invalidates the prayer and necessitates its repetition, unless it was uncovered unintentionally and she promptly covered it, in which case her prayer is valid. However, if the outer garments become uncovered but there remain fixed inner garments that conceal the skin color, the prayer is not invalidated by that.