I’m pretty picky about sweaters. Crewneck sweaters especially often tend to be too boxy and bulky, suitable only to be paired with a headband and a double strand of pearls. The cashmere crewneck sweater ($128) from Aqua, one of Bloomingdales’ in-house brands, is narrow and fitted, and the knit is thin enough so you can wear it under a jacket without turning into the Michelin Man. Besides the magenta and black listed on the Web site, I also saw gray and navy at the store at 900 N. Michigan.