Introducing the Theory Boxy Short Sleeve Shirt. Ist. Core. Helpers. StringHelper. RemoveHtmlTags("{@@=Ist. Core. Helpers. StringHelper. ToProperCase("An elevated classic, this menswear-inspired shirt is cropped along a straight cut that feels cool yet sophisticated. It's crafted with Good Wool with a hint of stretch for a relaxed feel. She is wearing a size S. Washing Instructions: Dry Clean Only. Composition and Material: 96% Wool, 4% Elastane.. Colour: white