Was he a Benedictine or Cistercian monk?

In 1113 Bernard was professed at Citeaux, so becoming a 'Cisterian' monk. The abbot of Citeaux, Stephen Harding (an Englishman) had developed the Cistercian order. The were an off-shoot of the Benedictines, keeping stricter observance of the Rule of Benedict. The wore a white tunic, not black.