Introducing the Theory Crepe Pull On Trouser. Ist. Core. Helpers. StringHelper. RemoveHtmlTags("{@@=Ist. Core. Helpers. StringHelper. ToProperCase("An evolution of our best-selling Treeca Trouser, this pull-on version is reimagined with an elastic waistband and mock fly for an effortless approach to tailoring. Constructed in Japanese Admiral Crepe for a smooth finish and softly draped fit that still maintains a tailored appearance. She is wearing a size S. Washing Instructions: Dry Ckean Only. Composition and Material: 70% Triacetate, 30% Polyester.. Colour: black