NWT Theory Crepe Slim Blazer Size 0 Color Geranium Chest pocket, 2 front pockets If slim-fitting and eco-conscious looks are your stylistic bread and butter, then this single-breasted blazer from Theory is one to turn to season after season. It’s made from the brand’s signature Admiral Crepe, a triacetate blend that’s formed using fruit-based acetic acid and wood pulp from sustainably managed forests.