Half zip sweaters are ideal for the cooler months of the year, providing just that little more warmth that is needed but without the bulkiness. The Calvin Klein Columbia half-zip sweater is a classically styled sweater that just oozes quality and class. It is made from the finest cotton and polyester in a 50/50 split. It has a half-zip up to a high neck with a ribbed design around the neck, cuffs and hem. The sweater is soft to the touch to give a great feel every time you put the top on.