Traditional postulants wear a black veil which has a white trim. This veil is pinned to their hair and is seen being worn by the postulant who is pictured the far left side of the video. These postulants wear a white collar on their black cape, which is worn over a long sleeved black shirt. They wear a long pleated black skirt with a belt to which a rosary is attached.
Novices wear the full habit of the order or convent. They wear the identical veil of the professed nuns, but that veil is white. If they must go outside to visit a doctor's or dentist office, then they will temporarily be allowed to wear the black veil of the professed nuns. This is to protect them. However, sisters who serve as nurses will typically wear a white veil while on a nursing assignment.
Many novus ordo sisters now wear either normal street clothes or they wear what looks like a postulant's garb. However, there are still some novus ordo sisters and nuns who wear a traditional habit, especially those from the Franciscans, Dominicans, and Carmelites.