Most chunky cardigans would not be regarded as business-casual attire, but a sweater made using the aforementioned viscose or cashmere could easily be used to create a more formal look. Another great professional option would be a cardigan blazer which has more structure and a less-relaxed appearance. Cardigans can also be dressed up depending on the rest of your outfit. One classic business-casual look would be a professional dress with a cardigan layered on top, but a more travel-friendly look might be a cardigan paired with trousers and a blouse.