- 100% Organic Cotton - Round Neckline - Hip Length - Straight - Slim Fit - Short Sleeve - Unlined - Crystal Embellishment The Sweet Sacre Bleu Slim Round Neck Tee contours to the body with everyday ease. This styling essential is elevated by considered detailing and embellishment. Inspired by the ornate interiors of Le Train Bleu, in the print a deep blue landscape is overlaid by gilded Belle Epoque detailing.